Janurary 20 i was with my boy friend and he did cum but it was from jerking off. It got on my thigh but he was rubbing his penis on my vagina before he cummed but i dont know if there was precum. I didnt feel anything wet or anything. We also didnt have sex, he didnt go in. Just put it on like the top of my vagina. I took a test just because i wanted to make sure a week later and it was negative. I usually get my period near the ending of the month around the 20th of each month. In november i got it the 28 to december 2. and then again in January on the 1st to the 5th. So im confused if my period is supposed to be here around this week or till the end of the month. My boobs are sore and they do get sore before i start period.