Leftover hcg 6 weeks after miscarriage and after a period?!

Roo87vet

Anyone still had positive pregnancy tests/hcg leftover 6 weeks after mc and after they had another period?!

I had a light 3 day period exactly 4 weeks after my mc.

I should be 6dpo today on that next cycle but got a bfp this morning?!?!

Surely can’t be a new pregnancy that early after ovulation but how can I have had a period and ovulated with hcg left?!

Anyone had this xx