Me and my bf had an unprotected sex 3 days before my period. He only did 5 strokes(maybe less than) and didn't cm nor cm on me. Last february i took nordette because of our unprotected sex too but this second I didn't take any pill and now my period is 2 days delayed which is today. What are the possible reasons that I'm delayed and what's the best accurate reason? I searched from some reasons it says that I can be just stressed about it. Yes, I am stressed but I'm confused which reason should I believe. PLEASE HELP :(