First off I'm not on any birth control. I had unprotected sex when i was ovulating which is why I'm worried. The sex was also five days before my period was due. My period was six days late, which this was the latest it's ever been. Just recently i started spotting dark brown only when i wiped. I put a pantyliner on it became medium flow. (11 days later from ovulating) It was kind of pink too. But then today i started bleeding red so i decided to put a tampon in. And i can't tell if theres clots or not. My period is usually really heavy. Could this be my period? Or implantation bleeding? Should i still get a pregnancy test just to be on the safe side?