Im on the pill and I had unprotected sex 10 weeks ago. We were fooling around and got caught up in the moment and things went further than they should. Basically he got as far as putting his penis in before i stopped anything further happening. Since then ive had two what appeared to be normal periods. Yesterday i was due to start my period and it seemed like it was all on track however it has only been brown blood and very light. Im usually quite heavy. Even today it got a little heavier during the day but now appears to be like spotting brown blood here and there. Does anyone know what this could mean?