I was 7 days late, figured it was because February was a shorter month, but that would still make me 3-4 days late. Then I started my period, very heavy flow, with large blood clots. One was like a little smaller than a golf ball. My period ha now stopped but I am continuing to feel very nauseous and weak, and I m eating SO much, I never feel full. Also, my tummy feels harder and looks a little bigger. What could be happening?