Help!! Confused!

Lindsay
Ok so I had a D&C on 24 June and have been getting blood draws every couple weeks to monitor hcg. On Friday my hcg was 19 but I also got my period that day... I've read conflicting information about how you shouldn't get it until it's below 5...and then some say below 25. What is the right answer? Is this truly my first cycle after my m/c? TIA!!