J.W.
Sorry about your miscarriage. I've been there and it sucks!
I had a D and C several years ago for chronic heavy periods. I had 2 periods a month with very heavy bleeding several times a year. When they do the procedure, they are scraping your uterus. Mine was done to clean everything out. Yours would have been done for the same thing. I think it will take time to go back to normal. If you are having other normal symptoms of periods, it probably is one.