Help please! Anyone have opks do this?

I normally ovulate CD15. Positive opk CD13. But this month my period was a week late. I started my OPKs CD7. Yesterday CD8 it got pretty dark but not positive so I thought today would be my positive but it’s back to light.

Has anyone had this happen and have it end up going back darker and ovulating ? Normally I just have a gradually increase then positive CD13. So confused!?

My BF isn’t home till CD13 that’s why I’m so concerned. Help!? 😣

Normally that’s what my opk looks like on CD9 but I’m worried because it got darker yesterday that I’m going to miss it this month?? Thanks so much