I have been taking birth control going on a year now. I'm supposed to start my new pack of birth control this Sunday but I won't be able to pick up my new pack till Monday. My boyfriend and I had unprotected sex on my period yesterday which was Thursday. I'm worried that I might get pregnant for being a day late on my pills because I know sperm can live in the body for up to 7 days. (By the way I started my period Wednesday night and my period usually last till Monday)