Ok  had unprotected sex a few days before my period started, well I did still get bleeding like a normal period, same length and everything, now two weeks later, I'm having back pain and mild cramping, my cm is switching between creamy and watery and I'm super tired all the time... Has anyone had this happen or am I just being paranoid ? Also if you haven't can you explain the cramping, I don't usually cramp during ovulation. And it's to early for pms. Thanks