Implantation, abrasion, or spotting before period?
So a couple days ago my boyfriend & I had sex, fairly rough. I noticed the next day that I had a reddish/brownish discharged coming out when I wiped. I am on the pill & we use a condom. We start without a condom & then put it on when he feels he is getting close. I am also not extremely strict with my pill though I take it every night & haven't missed one this cycle. I just dont take it at exactly the same time every night. I am also supposed to get my period in a week. Could this be implantation bleeding, an abrasion, or just light spotting as a result of PMS? Thank you