What are the chances of getting pregnant two days before my period if I am currently on the pill form of birth control? I've been on it for over 4 years now and take it at 7:30 every morning. My boyfriend and I were having intercourse when he was a little slow on pulling out. We had intercourse last night (Saturday) and today (Sunday) I started my "sugar" pills, but my period doesn't normally start till Monday. I'm a little scared now as I still have a year left of college. I've never taken the Plan B before, do you think I will need to in this situation?