First postpartum cycle and using OPK but no dark line!

I have a 17 month old daughter and just got my first period postpartum a couple of weeks ago! I breastfeed a lot, which is why it took so long for my period to return. Once my period ended I started using opk, testing twice a day, but I’m starting to wonder if I’m going to ovulate. I think from what I read it can take some time after your period returns to ovulate again. Does anyone know about this?

And, any insight on my OPKs below would be so helpful! I’m currently on CD 16.

Thanks mamas!!! Xoxo