I had unprotected sex with my boyfriend the day before my period, which was friday. he came earlier so i know there was sperm in his precum.... but i was really drunk and figured it would be ok to have sex since i was having my period the next day for sure (very very regular cycle). anyway, its not a week later and i have dark brown stains around my vagina and on my underwear , its like dried blood, except i have been showering? my period was really heavy anyway, but im still worried im pregnant considering this brown blood and im still getting cramps etc... can anyone help me?