Kinda TMI.

Two days ago on the last day of my period, my boyfriend and i did anal with lots of lube. It was my first time doing anal.When he pulled out something ran down close to my vagina, im not sure if it was cum or lube or both, but he scrubbed it off. Anyway i went to the bathroom and had diaherra, wasn't alot. I think some of the cum came out then. Anyway i have ocd and i was sure some had gotten in my vagina. So i went and got the plan B pill and took it within an hour and a half of having sex. I then showered scrubbing both my ass and vagina with soap. Still terrified that somehow I still have cum in my ass and im scared itll leak out into my vagina.i shoved toliet paper in between my ass cheeks to stop any cum. I read that if it does leak into the vagina, you can get pregnant. Can someone tell me if im just overreacting? I told both my mother and friend and they both said they doubt i could be pregnant. Please help. I havent slept for two days im so worried.