I'm 17 and I have been on the pill since I was 15 (for medical reasons), but recently my bf and I have been fooling around. I start my pills on Sundays but my period didn't end until like Wednesday the on Friday my bf put his penis inside me for a little but I soon took it out and just gave him a bj instead. But then after the bj he went back inside of me again but I took it out before anything could happen like ejactulate. What's the chance that I could be pregnant since I'm on the pill? I recently changed the time that I take my pill from night to morning...will that affect it at all?