I had unprotected sex (I know it isn't smart and the guy convinced me but still not smart) and the guy told me his pull out game was strong which is what convinced me (don't think it was) he pulled out and told me "oh wow I already finished" and I know he came as he pulled out because I felt it and I'm not sure he came in me at all. He wiped himself off then put it back in me but not for long before I told him to take it out. I took the plan b pill 2 hours later but I'm not sure when I ovulate since I am irregular. Should I be worried?