Have you stopped spotting for more than 20 days and have had your AF? If so, your hormones are probably back to pre-pregnancy state. If you are still spotting and have a weird AF that you're not if it was an AF or not, go get your HCG tested - or just wait until you get a normal AF.
I went from 9000 to 214 in one week (week of my m/c) then 214 to 7 in two weeks. Then I think I stayed in 7 for a veeeeery long time because I kept spotting and my AF didn't come until seven more weeks after that. I didn't get HCG tested after I hit 7 though, so I'm not too sure.
There's no standard for the m/c recovery process... it varies sooo much. It also depends on if you m/ced naturally or got the tablet or had D&C done. From my experience, and reading on the net, it takes hormones a lot longer to normalize if you m/ced naturally.