I had unprotected sex on day 4 and day 2 before my period. I still got my period like normal. It ended on day 5 and I went over a day without bleeding. Yesterday I noticed light pink blood at one point and then it happened once again today. It’s kinda on and off, but I’ve never had this before. Once my period is done it’s done. I’ve also had mild cramps, nothing too bad but I’ve still never experienced this. I’m not sure if this is a dumb question or not, but could it be implantation bleeding?