Hi so yesterday I was messing around with this guy and he started dry humping me from behind(around my anus, there was absolutely no penetration, he was dry, there may have been pre-cum but I didn't feel any wetness and I wasn't very wet at all. After about 10seconds I told him to stop. About 10mins after that I got in the shower and washed off (I know thats not supposed to help at all but I figured if there was any pre-cum around the outside of my vagina I could wash it away with soap) I also cleaned the area with surgical spirits(I know its dangerous but I was scared). I have been on a weak pill (yasmin) for about 2 years now for my skin, I take them regularly usually within 2-3 hour difference. what is the possibility that I may be pregnant?