I had a miscarriage on November 20, 2011 and I just had my first period on February 9, 2012. My first period post mc was painful but didn't last that long. Good luck with yours!
I'm sorry about your loss. With my last miscarriage, I ovulated 16 days after the first day of m/c bleeding. Then after I ovulated, I got my period about 2 weeks later.