Any truth to most fertile right after a miscarriage ?

Haley • 👧🏻 7/17/18 👼🏻 6/30/20 🤰🏻(twins) 4/6/21

I had MC on 6/30 and ended bleeding about 5 days after. Got a positive OPK on 7/11. My blood levels were 0 on 7/2 so know it’s not leftover HCG.

Science seems to be conflicting on articles I’ve read.