Whether you’re trying to get pregnant and you want to know what to expect, or if you’re worried you might be pregnant and want to know how to spot it, we’ve put together a timeline of the early signs of pregnancy, to help you. The timings given here are approximations only and may vary from person to person due to individual differences. If you think you may be pregnant, a pregnancy test is the most reliable method to be sure.

4 weeks after last period:

Missed Period

For women who have a normal menstrual cycle, the first sign of pregnancy is usually a missed period or a period that is much lighter than usual. If you experience a missed period, it is recommended that you take a pregnancy test. A missed period is one of the most reliable indicators of pregnancy, other than a positive test result.

Breast tenderness

This can be similar to how your breasts may feel before a period. The breasts may be slightly larger, more sensitive and the nipples may be more prominent.

Heightened senses and cravings

Increased sensitivity to taste and smell are often reported. You may also experience cravings for certain foods, changed in which foods you like and a metallic taste in your mouth.

6 weeks after last period:

Morning sickness

Morning sickness may begin about 6 weeks after your last period. This can occur at any time of day, not just in the morning. Morning sickness can be a feeling of nausea and/or vomiting.

Increased urination

You may feel the need to urinate more often than usual in the day or night.

12 weeks after last period:

Tiredness

Tiredness and feelings of exhaustion are common during pregnancy. This may have effects upon your emotions and morning sickness.

Sources:

NHS > Signs and Symptoms of Pregnancy 

Bounty > Early signs of pregnancy 

Working Mother > When do your breasts start to hurt during pregnancy? 

New Kids Center > When do pregnancy cravings start?