What does your body feel like 5 weeks pregnant?

You may not even feel (or possibly even know) that you are 5 weeks pregnant. You don't usually find out you are pregnant until the fourth week because the fourth week of pregnancy is the week that you would miss your expected period. So by week 5 you may possibly start feeling some morning sickness or noticing some changes in your breasts (such as tenderness/swolleness or different colorization in your nipples).