Implantation bleeding??!!

Virginia

So September 17th I had a period it lasted 10 days. (Out of normal, mine usually last 4-5 days). I was ovulating October 2nd. Still fertile the 3rd. Had unprotected sex the 5th and 6th. Now today on the 9th I started having light bleeding. It’s a week too soon for my period. Obviously the 5&6th wouldn’t be enough time for the implantation bleeding, but I’m super lost on if it could be my period or not. Help y’all, please.