When should I test again

My period was supposed to start March 17 didn’t came. So I told a pregnancy test the day after my missed period (March 18) at 8:00pm and it said negative. I want to take another test to make sure it’s negative. Should I wait until next week to take a test or can I take a test tomorrow.

I’m just don’t know why my period have not came. Maybe it’s because I’m stressed.

P.S NOT trying to get Pregnant