If the miscarriage occurs in the early stages of pregnancy, hCG levels are typically lower, and they may return to pre-pregnancy levels more quickly, often within a few days to a couple of weeks.
I was 9 weeks when I miscarried I got a negative test 2 weeks later and ovulated 2 weeks after that point and my cycle came back to normal.
With my 1st pregnancy 2 weeks after miscarriage. With my 2nd pregnancy 5-6 weeks after miscarriage. With my 3rd pregnancy 3 weeks after miscarriage. With my chemical pregnancy I tested negative 2 days after bleeding started.