While you're trying to convince, it could be a daunting and perpetually wondering if you're expecting could further cause stress. So here's what you can do to prioritize your physical and mental health.

Be patient

Wait till you have tested and it detects a pregnancy, mostly by the end of the week. As you start testing, if you get a negative result, then feel free to keep testing every couple of days till you get your period.

Ace that test

When it's the time to take the pregnancy test by the end of the week, take it as the first thing in the morning. Your morning pee is the most concentrated, which makes it most likely to have a high enough concentration of hCG for the test to detect.

Continue taking care of yourself

You should be taking your prenatal vitamins every day, drinking plenty of water and having healthy balanced meals. Continue to get regular moderate exercise and practice self-care care.

Source: https://www.thebump.com/pregnancy-week-by-week/3-weeks-pregnant#5