My first post m/c AF started yesterday, ~4 weeks after m/c, 1 week after my HCG went to 0. I've heard it can be heavier than normal but didn't expect this. At work, I bleed through in less than an hour after changing and had to leave work in a hurry. I don't think anyone noticed but I'm so embarrassed.
Lesson Learned: Should have stocked up on extra super tampons instead of my regulars and changing more frequently.