Most likely yesterday. I started using progesterone cream this cycle, so I don't know if my luteal phase was still only 12 days or not. If it was.. I was due yesterday. Yesterday was the height of my spotting. But, it's not looking anything like AF and there's not AF cramps involved. I've been through bleeding after a chemical, and it was heavy and painful and the tests were all negative by then. So, I don't THINK that's what's happening. But, I don't know. I guess if my LP is different this cycle, I have no idea when I was due on. Hmmph!