My cycles have been kinda screwy too. I had a d&c in Oct, AF came 32 days later (heavier than usual, but lasted for the normal 5 days and was fine). Then 2 weeks later, I had AF again, but it was light and spotty and lasted for 2 WEEKS, UGH! Now I'm on my 3rd cycle and it seems to be pretty normal.
I'm sure there is no "normal" after m/c. I know that we will all get pg again with sticky babies and have beautiful children. As long as you're not bleeding super heavy or anything, I'm sure that whatever is going on with your body is just how your body handles the trauma of m/c. You'll be regular again soon