Help please!

Miscarried on 3rd May and bled till 9th. AF started on 24th May and I've been spotting continously for the last 4 days I don't know why. I randomly used an opk and it's darker than it was in this cycle and the cycle before that. I never got a dark opk in my previous cycle and started my period early aswell. It's my first time using OPKs so I don't know what to think. I know this is negative but am I close? Should I keep testing the next few days? Or is it way too early to test opk? I'm on CD10 today.