thanks for the query.
decreases after abortion
and can take anywhere from 9 to 35 days, with a median of 19 days to be back to normal.
However, the time-frame for when an hCG result will be negative is dependent on what the hCG level was at the time of the miscarriage
If the levels of hCG do not fall to undetectable levels, some hCG-producing tissue may remain and have to be removed.
In your case i recommend you to get a repeat USG done to know the retained products of conception which needs to be evacuated either medically or surgically.
Take NSAID's for symptomatic pain relief.
hope this helps,