On about the 16th or 17th of Feb. I was with my "friends with benefits". I gave him a blowjob but we never had sex but I would touch him and his penis was really wet, im thinking because of the saliva from the blowjob and after that i fingered myself while he jacked off. Anyway my period was supposed to be 9 days ago and I'm thinking that maybe I had pre-cum on my hands or something? Also I was reading that being stressed out can make you miss your period and the weeks after we fooled around i had a lot of school work and there was a school play i was in so i dont really know if that counts as stress. If anyone could shed some light on the subject please, I don't want to waste my life away by possibly being pregnant (my school expels you if you're pregnant, and my graduation is in like 2 months). Please and thanks to everyone who answers this!