You don't have to O to get AF. You can get AF from a drop in eostrogen as well as a drop in progesterone. Eostrogen withdrawl bleeds tend to be painful, heavy an clotty.

BW
Hi Butterfly warrior, I was just wondering what you mean by oestrogen withdrawl tends to be painful, heavy and clotty. My periods are v painful, heavy and v clotty every month. I don't have PCOS or other prob as far as I know, and my AF is very regular. What does 'oestrogen withdrawl' mean in terms of hormones and cycles? Also, do you know if it's possible to ovulate at different times each cycle, eg, early some cycles, late in others?

Cheers,
Rachel