So January 20 i was with my boyfriend. And he did cum but it was from jerking off. The cum got on my thigh but he was rubbing his penis on my vagina before he cummed so i dont know if there was precum. I didnt feel anything wet or anything. He didnt go in or anything no sex no nothing. Just put it on the top. I did take a pregnancy test 1 week after just in case and it was negative. I usually get my period near the ending of the month around the 20th. In nov i got on the 28 to dec 2. and then in December, i didnt until January 1-5. So im wondering if my period is supposed to be coming now or till the ending of february. My boobs are sore and i always get that when im going to start my period.