I was supposed to get my period on Friday and it is now Sunday. Usually I can tell if I'm about to get it, I usually don't have discharge for about 3 days before I get my period. I didn't have discharge but then i went and stayed at my boyfriends house on Saturday night. We did foreplay and he put half his penis in me and as soon as he knew he was going to cum he immediately pulled out. Then since I did some foreplay with him I have had discharge and it doesn't feel like I'm getting my period? I'm almost always on the right day every month to get my period.