Me And My Boyfriendhad Sex Just Two Hours Before I

Me and my boyfriendhad sex just two hours before i started my period today and its a little light But on my first day of my periods are heavy and i can feel my flow But this time it just dont feel rite... Maybe iam just over thanking it But i know for a fact that you can get pregnant on and before your period I have a 6 year old that way..