When to Call Your Doctor During Pregnancy: A Week-by-Week Guide

Knowing when a symptom is just pregnancy being pregnancy — and when it genuinely needs same-day attention — is one of the most useful things you can learn. This guide gives you a clear, trimester-by-trimester framework so you always know what action to take, from "this is expected, no action needed" through to "leave for the ER right now."

The guidance here covers the most common scenarios. It is not a substitute for your own provider, who knows your specific history. When in doubt, call. A good maternity team would always rather you call unnecessarily than not call when it matters.

The Four-Tier Urgency Framework

Every symptom in this guide falls into one of four categories. Use this as your reference throughout pregnancy:

First Trimester: Weeks 5–13

The first trimester is driven largely by rapidly rising hCG levels, which double every 48–72 hours and peak around week 10. Most symptoms you feel are a direct result of this hormonal surge — including nausea, fatigue, breast tenderness, and frequent urination. Understanding this helps reframe symptoms as biological confirmation that the pregnancy is progressing, rather than signs that something is wrong.

What Is Normal in the First Trimester

Normal Nausea and vomiting — Affects 70–80% of pregnancies. Peaks at weeks 10–12 when hCG is highest. Most people notice significant improvement by weeks 12–14. Any time of day, not just morning. See our guide on why nausea peaks at week 10 for the hCG mechanism.

Normal Fatigue — Progesterone has a direct sedative effect on the central nervous system. Combined with the energy demands of building a placenta, sleeping 10–12 hours and still feeling exhausted is entirely normal in weeks 6–12.

Normal Breast tenderness, frequent urination, food aversions, heightened sense of smell — All driven by rising estrogen and hCG. These typically ease or change character in the second trimester.

Symptoms to Monitor in the First Trimester

Monitor Light spotting — pink or brown — Common in weeks 4–8. Implantation bleeding (light, 1–3 days, no clots) is normal. Cervical sensitivity after intercourse can also cause brief spotting. Call your provider if spotting becomes red, increases in volume, or is accompanied by cramping. See our 5 weeks pregnant: spotting and no symptoms guide for a detailed comparison of implantation bleeding vs. miscarriage signs.

Monitor Mild, period-like cramping — The uterus is growing rapidly; round ligaments that support it are stretching. Mild cramping on both sides is common. Call if cramping is severe, one-sided, or accompanied by shoulder tip pain — this combination may indicate ectopic pregnancy. See our 8-week scan: heartbeat anxiety explained guide for what an early scan can tell you.

When to Call — First Trimester

When to Go to the ER — First Trimester

About ectopic pregnancy: An ectopic pregnancy occurs when the fertilised egg implants outside the uterus — most commonly in a fallopian tube. Symptoms appear between weeks 4–10 and can escalate from mild one-sided discomfort to a surgical emergency within hours. Shoulder tip pain (caused by internal bleeding irritating the diaphragm) is a late sign that internal bleeding is occurring. Do not wait for shoulder pain to appear before going to the ER if you have one-sided pelvic pain with spotting.

For more on early pregnancy milestones: 5 weeks pregnant: spotting and no symptoms · 8-week scan: heartbeat anxiety explained · why nausea peaks at week 10

Second Trimester: Weeks 14–27

For many people the second trimester brings relief: nausea eases, energy returns, and the pregnancy begins to feel more real as the bump appears and movement begins. But new symptoms — some normal, some requiring attention — emerge during this period. The most important new considerations are fetal movement and signs of preterm labour.

What Is Normal in the Second Trimester

Normal No perceived fetal movement before 24 weeks — Formal kick counting is not recommended until 28 weeks. Before 24 weeks, movement is present but often too subtle to feel consistently. First-time parents typically feel movement later (20–22 weeks) than those who have been pregnant before (16–18 weeks). Absence of felt movement before 24 weeks is not a red flag.

Normal Round ligament pain — Sharp, stabbing twinges in the lower abdomen or groin when moving suddenly, sneezing, or coughing. Caused by the round ligaments stretching rapidly as the uterus grows. Brief, predictable, and benign.

Normal Braxton Hicks contractions from 20 weeks — Irregular tightening of the uterus, usually painless, not increasing in frequency or intensity, and easing with movement or position change. These are practice contractions and are not a sign of labour.

Monitor Glucose challenge test result of 130–140 mg/dL — This screening threshold triggers a follow-up 3-hour glucose tolerance test. It is not a diagnosis of gestational diabetes. Many people who screen positive at this level test normal on the 3-hour test. Follow your provider's instructions and do not self-diagnose based on the 1-hour result.

When to Call — Second Trimester

For more detail: movement at 21 weeks: what's normal · viability and preterm labour signs at 26 weeks · kick counting starts at 28 weeks

Third Trimester: Weeks 28–40

The third trimester brings increasing physical discomfort as the baby grows and the uterus occupies most of the abdominal cavity. Most symptoms are mechanical — caused by pressure, displacement of organs, and the weight of the pregnancy. But this is also when serious conditions like preeclampsia and placental abruption are most likely to occur, and when preterm labour becomes a real consideration.

What Is Normal in the Third Trimester

Normal Shortness of breath when walking or climbing stairs — The diaphragm is displaced upward by approximately 4 cm by the third trimester. The lungs have less room to expand. Breathlessness on exertion is expected and normal.

Normal Intensifying Braxton Hicks — These practice contractions become stronger and more noticeable in the third trimester. They remain irregular, do not increase consistently in frequency or intensity, and ease with movement, hydration, or a bath. Irregular Braxton Hicks that respond to water are not labour.

Normal Swollen ankles in the evenings — Dependent oedema (fluid pooling in the lower legs at the end of the day) is common from around 28 weeks onward. It typically improves overnight with leg elevation. It is the face and hands swelling that warrants a call, not the ankles.

Normal Pelvic pressure and heaviness — As the baby descends into the pelvis in preparation for birth (lightening), pressure on the cervix and pelvis is expected. Time pelvic pressure: if it becomes rhythmic and every 10 minutes, call your provider.

When to Call — Third Trimester

When to Go to the ER — Third Trimester

For more: shortness of breath and Braxton Hicks at 29 weeks · discomfort and preterm labour signs at 34 weeks · early term birth at 37 weeks · real labour signs at 38 weeks

Go to Your Nearest ER Now — Don't Call First

The following situations are emergencies. Do not phone ahead, do not wait to see if things improve, and do not wait for your partner to come home if there are faster options. Go directly to your nearest emergency department or call an ambulance:

• Heavy vaginal bleeding — soaking more than 1 pad per hour. This level of blood loss requires immediate obstetric assessment regardless of gestation.
• Severe one-sided abdominal or pelvic pain with any bleeding. This combination, especially in the first trimester, is the hallmark presentation of ectopic pregnancy.
• Shoulder tip pain combined with pelvic pain. Pain at the shoulder tip, particularly when lying down, is caused by blood from internal bleeding irritating the diaphragm — a sign of significant internal haemorrhage.
• Water breaking before 37 weeks. Preterm premature rupture of membranes (PPROM) is a serious complication requiring hospital admission and monitoring regardless of whether contractions have started.
• Contractions every 5 minutes, lasting 1 minute, for at least 1 hour (5-1-1 rule). This pattern, especially if contractions are intensifying and not easing with water or movement, indicates established labour.
• Sudden loss of consciousness or fainting. Syncope in pregnancy can have multiple serious causes including severe anaemia, cardiac arrhythmia, or haemorrhage.
• Severe chest pain or inability to breathe at rest. Pulmonary embolism is a leading cause of maternal death and presents with sudden chest pain and breathlessness that does not ease with rest.
• Green or brown amniotic fluid (meconium staining). Meconium in the amniotic fluid indicates the baby has had a bowel movement in utero, which can be a sign of fetal distress and requires immediate delivery assessment.
• Urge to push before full term. An uncontrollable urge to bear down before 37 weeks may indicate rapid preterm delivery — go to hospital immediately.

Call Your Provider Now — Same Day

The following symptoms need a same-day phone call to your midwife, OB, or prenatal provider — not a message in the patient portal, not waiting for your next scheduled appointment:

• Any vaginal bleeding after 20 weeks, even light spotting. Placenta praevia, placenta accreta, and vasa praevia can all present with seemingly minor bleeding.
• Contractions every 10 minutes or closer before 37 weeks. This is the threshold for preterm labour assessment. Your provider may want to examine you and possibly start tocolytic treatment.
• Unable to keep fluids down for 8+ hours. Severe dehydration in pregnancy affects the baby's wellbeing and may require IV fluids.
• Cannot reach 10 fetal movements in a 2-hour count after 28 weeks. Reduced movement can be an early sign of fetal compromise. Do not wait until morning, and do not wait for your next appointment.
• Fever above 38°C / 100.4°F. Fever in pregnancy can indicate infection that may affect the baby and requires prompt investigation and treatment.
• Severe headache not relieved by paracetamol. Combined with other features, this is a preeclampsia warning sign. Even in isolation, persistent severe headache in pregnancy warrants assessment.
• Vision changes: blurred vision, flashing lights, blind spots. These can be early signs of preeclampsia or HELLP syndrome and are not something to monitor at home.
• Sudden swelling of the face or hands. Distinct from the normal ankle oedema of pregnancy, facial or hand swelling — especially if sudden — is a preeclampsia sign.
• Burning urination with back pain. UTI is the most common infection in pregnancy; untreated, it can progress to pyelonephritis (kidney infection), which can trigger preterm labour.
• Shortness of breath at rest that does not ease within 5 minutes. PE risk increases throughout pregnancy and peaks in the weeks around delivery. Shortness of breath at rest that is new and persistent must be assessed urgently.

Usually Normal — But Worth Monitoring

These symptoms are common and, in most cases, require no immediate action. Keep a note of them — when they started, how severe they are, and whether they are changing — and mention them to your provider at your next appointment, or call if any of them escalate.

• Light pink or brown spotting in the first trimester. Implantation bleeding and cervical sensitivity are the most common causes. Monitor colour, volume, and whether cramping accompanies it. Light, brief, brown or pink — monitor. Heavy, red, with cramps — call.
• Mild cramping similar to period pain. The uterus is growing and stretching its supporting ligaments. Mild, bilateral, intermittent cramping is common throughout the first trimester. Track whether it is worsening or becoming one-sided.
• Occasional Braxton Hicks from 20 weeks. Irregular practice contractions are normal from mid-pregnancy. Irregular, painless, not increasing in frequency — monitor. Regular, every 10 minutes, painful — call.
• Swollen ankles in the evenings. Fluid pooling in the lower legs at the end of the day is a normal consequence of increased blood volume and reduced venous return. Elevate legs overnight. If swelling is sudden, affects the face or hands, or is accompanied by headache — call.
• Occasional dizziness when standing up quickly. Orthostatic hypotension (blood pressure dropping on standing) is common in pregnancy due to increased blood vessel relaxation. Sit up slowly, rise slowly, stay hydrated. If dizziness leads to fainting or is very frequent — call.
• Feeling less movement on some days before 28 weeks. Before 28 weeks, formal kick counting is not expected. Movement patterns are not yet consistent and the baby has room to move away from the uterine wall. After 28 weeks, trust your baseline and call if it feels significantly reduced.