I had a natural mc on November 30th at 10 weeks, bled 5 days, then no period until 9 weeks later (CD61 or something...), but it's been weird. I think it's fairly common for women's cycles to get really messed up after a MC. Even though your wall is thickening up, maybe your hormones aren't signaling whatever needs to happen to bring on AF? (Like some women only have periods because their wall builds up so much and basically collapses in on itself, not because the hormones are telling it to do what it's supposed to do.) Maybe you could ask your doctor to check your hormone levels like progesterone or whatever it is that signals everything. Obviously I'm not a doctor and could be totally wrong about this stuff. Just my random thoughts. I hope you get it figured out. Having our bodies totally out of whack after a MC is just insult to injury!!! Hang in there!