missed miscarriage at 9 wks 5 days

I had a missed miscarriage on March 24 , baby measured 8 weeks 2 days when I was supposed to be 9 wks 5 days my hcg hormone was very high can't rememeber but last month I had a very light period for 4 days with clots (1 big and some small and others string like) and before period had 5 days of spotting on and off my hcg was 57, this month I started my period today but it was light with string clots in the morning then it went to just when I wiped but know at night it's gone 2 weeks ago my hcg was 20, is this normal? did y'all get light period after miscarriage, and how long did it took to go back to normal?