OPK darker then lighter, no positive

Can someone help me figure this out? I’m wondering if I just didn’t ovulate this month :( I’ve used these OPKs before and have seen definitive positives, but never had so many dark days (pun intended). I started my cycle on 7/1 so dates correspond to cycle days. I do have PCOS but it’s been pretty cooperative the last few months with regular cycles of roughly 32-34 days. I would think tomorrow would be my O day but the lines are now getting lighter. What’d you all think?