Positive OPK, Bleeding

Genna • Scientist Mommy! Finley Cooper 08/19/16 Noah Wyatt 01/17/20 🌈. Two babies in ✝️.

I lost my pregnancy at 4 weeks last month, started bleeding/miscarrying 1 day after my missed AF. Doc said to count that as first day of cycle, I bled for 5 days then got my first Positive on the OPK strips starting on day 11 of my cycle, got another couple positives on day 12 as well. I started off with light, bright red but diluted blood this evening (CD12) that has progressed to moderate dark red blood. Does anyone know why that might happen? When it was lighter I thought it might be ovulation bleeding but it is now heavier so I’m pretty confused. I’m definitely getting strong OPK positives though. 🤔 Anyone have any ideas? Thanks!