I had sex with my bf yesterday without a condom, he usually pulls out before he cums. We have been using this method for the past 3 and a half years, and no pregnancy has occurred. But last night while we were having sex he unexpectedly came alittle bit. He managed to pull out in time and wipe it off. Then he put himself back in me and kept on going till he pulled out and came again. I heard somewhere that even though a man wipes off the semen, that there could still be some inside him and if he has sex it could come out without him knowing it. Is there a chance I could get pregnant?