Confused?

Harn

I tend to ovulate around day 17 of my cycle, I have done for the last 4 months since I started tracking. But this month my OPKs haven’t seemed to get any darker and I’m now on day 16 of my cycle. By now I’d have my peak.

My temp has stayed pretty low for the past few days.

Lasts months cycle did last an extra day or two longer than usual, could this be why? I’m worried I’m going to miss my chance this month.