So sorry for your loss. I had AF come 5 wks after my first loss (it was a very early loss, only 6 wks along and I started bleeding and passed everything on my own). After my second loss I ended up needing a d&c due to retained tissue and AF came exactly 4 wks after d&c.
Best of luck to you.
I actually went on the pill for a month to finally get AF back after my m/c after 90 days. I was 11w5d and had a d&c if that is any help. Especially if you have had a d&c I have heard it can take up to 8 weeks.