I had unprotected sex on Saturday night and Sunday morning but my period is supposed to start around today and I'm starting birth control when I get my period, I don't know if I should take a plan b because it's unhealthy to take so many hormones or should I just in case?? I don't know what to do please help! I took a pregnancy test yesterday and it said not pregnant. I don't know if I should take the plan b or not.