AF after MC?

At my 2nd US at 9 weeks, I found out that there was no heartbeat any more. I was administered 800mg cytotec vaginally on 8/3 and I bled for 2 weeks. My Hcg levels were 134 on 8/14 and 29 on 8/21. I have another blood draw tomorrow. I hope it will be under 5.... Anyway, this morning, I started bleeding. Is it possible that this is my period? Everything on line suggests that there have to be 20 days blood/spotting free days before one can have a "real period." Does that mean that this isn't my period since it's only been 11 days after I stopped bleeding?