So i'm spotting a week before my period, and i can't tell if it's implantation bleeding, spotting, or my period. I had unprotected sex a week ago from today, then the day after that i took my pill about 9 hours late. This is my third month of birth control. The spotting is a darker brownish red color, and it started only a few spots but now its starting to get heavy, and it stafted last night with very very minor cramping.