I've been spotting off and on since AF and this morning I lost a chunk of tissue. Ewww. It was clearly not a clot, definitely tissue (about the size of a quarter, greyish-brown with clots in it). That shouldn't be happening if my HCG was 18 10 days ago and I already had AF. The MW is stumped, too. I think I'm getting fertile, but I'm not sure because I have no CM to go by. Darn spotting. And now this. I really hope it's all done now. 6 weeks is long enough.