In week 4 of pregnancy, many people first discover that something is different, often because their period is late, or because their body starts reacting to early hormonal changes. Symptoms can resemble PMS, and some people don't notice anything yet. Here you'll find a practical guide to early signs of pregnancy in week 4, what you can do right now, and when it's relevant to test or contact healthcare professionals.

The most common early signs in week 4 can be:

• Sore or tender breasts
• Fatigue and a need for more rest
• Mild nausea or altered appetite
• More frequent urination than usual
• Cramping in the lower abdomen, which can resemble signs of menstruation

The most important thing is to see symptoms as possible signals, not as proof. Intensity and combination vary greatly from person to person, and the absence of symptoms does not rule out pregnancy.

If you suspect pregnancy in week 4, you might consider:

• Noting the first day of your last period so you can calculate the weeks more accurately.
• Prioritizing sleep and regular meals, especially if you feel unwell.
• Starting or continuing folic acid, if you are trying to conceive or may be pregnant (recommendations can be found from public health sources).

For many, a missed period is the first clear sign in week 4. If your cycle is usually regular, a delay can be a good reason to take a test. If your cycle often fluctuates, it can be more difficult to assess, and in this case, it makes sense to retest after a few days if the test is negative but your period still doesn't arrive.

As a rule of thumb, many test from the day their period is expected. Some tests can be used earlier, but an early negative result may be because the hCG level is not yet high enough to be measured in urine.

Some people experience a small spot of bleeding around the time the egg implants in the uterus. This can be confused with a very early period. Implantation bleeding is typically light and short-lived, but bleeding in early pregnancy can have several causes.

Contact a doctor or emergency doctor if:

• Heavy bleeding (like a period or more)
• Severe pain, one-sided pain, or shoulder pain
• Dizziness or discomfort that worries you

This is not to cause alarm, but to ensure that you are assessed promptly if something requires treatment.

A urine pregnancy test measures hCG, which increases at the beginning of pregnancy. In week 4, a test can be positive, especially if you test from or after your expected period.

• Test on or after your expected period to reduce the risk of a false negative.
• Follow the instructions for use carefully, including the reading time.
• If the test is negative but your period is still late, you can retest after 2-3 days or contact your doctor for advice.

If you're wondering "am I pregnant?", it can help to focus on concrete, cautious choices until you know for sure:

• Avoid smoking and alcohol if you may be pregnant.
• Choose a varied diet and drink water regularly.
• Seek help if you feel very worried, experience severe pain, or have persistent bleeding.

If you are already experiencing tender breasts, soft and flexible support can make daily life more comfortable. One option is the Carriwell Gel-Support® Maternity and Nursing Bra, which allows for changes and support without constricting.

• Sundhed.dk, Patient Handbook - Pregnancy Week 4 (last accessed 2026-05-13)
• Graviditet.dk - Pregnant Week 4 (last accessed 2026-05-13)
• Jordemoder.dk - Week 4 (last accessed 2026-05-13)