Waiting for my period.

Sandy
I stopped bleeding on the 21st and it seems like these last few weeks are dragging by so slow. My dr said that it should take 2 to 4 weeks for my period to come back, since my hcg was so low to begin with. On 8/17 my hcg was at 85, on the 19th it was at 37. Did anyone have really low hcg and how long did your period take?