could i be ovulating even though i never get solid positive opks?

Stef • TTC 👶🏻 #1 for 6 years 💍 Wife 💍

So my question is can i still be ovulating even though i never get solid positive opks? this is how dark they get but glow considers it negatives. I know i am in my fertile window so we bd as much as possible.

Also is it getting darker or are they all the same darkness? Please help!