How long after darkest + opk did you O?

Megan

For those of you that temp, how long after a super strong positive did you actually O? I got an almost positive Tuesday night and a very positive Wednesday morning (below)...but by Wednesday night it was already getting lighter. Just wondering if that means O happened? Does the strong line mean the end of the LH surge and therefore O happens more on the 12 hr side rather than 36 side? We didn’t BD until last night and will again tonight but I hope I’m not too late!