AF or still healing?

Ke
I began miscarrying on 12/28, and had my D&C on 1/4.  I bled for a few days after, but nothing like what I was warned about. I didn't go through pads like crazy, and it was pretty mild. After the bleeding stopped I spotted on and off for the next week or so. A few days ago I started getting cramps that felt just like menstrual cramps, and my lower back began to ache. Had I not just had a miscarriage, I would've thought that AF was rearing her ugly head. Well today I started bleeding. Not like after the D&C though.  More like my period before I was pregnant.
If I begin counting from the 28th when I started bleeding it's just over three weeks. If I begin counting from the D&C, it's just over two weeks. Could this really be my first AF post MC?
This was my first pregnancy and my first miscarriage so I am very new to all of this.