Okay, so this is what's going on. In July, I took a morning after pill and had my period normal period in August 26. On September 6 I had unprotected sex with my partner he came but outside of me so there wasn't any sperm inside of me. But then we had sex again about 20 mins later after had came. On Tuesday, September 11, we had sex again but this time when he pulled for a minutes he saw blood. (This is going to get a bit graphic) He was penetrating me pretty to point in which it started to hurt. After that we stop. A few hours later I had use the bathroom and noticed that there was still blood but it didn't look normal it looked sort of blackish red color and it had clots with it. It lasted for about 2 days.The blood went from a red black to a yellowish brown.Could this be implantation bleeding or something else. I have been stressed lately with college and I've also been exposed to a lot of heat. I live in Arizona so the temperatures get pretty bad over here. I am not due to ovulate until 12 so I don't think it could implantation bleeding because I had intercourse 4 days before ovulation. Any help or advice would be great. Thank you for your time.
-Note-
I am not experiencing any pregnancy symptoms.