So what should I consider ovulation day?

Lele • 👨‍👩‍👧‍👧mom to two beautiful daughters 10/25/16 & 6/13/19👧🏼Two angel babies👼🏼 08/18 👼🏼 09/18

Here is cd 12, 13 and 14. Clearly the surge was cd 12 and 13 and low today, so does that mean that ovulation is today or egg was released yesterday? The surge is supposed to happen 24-48 hours before ovulation right? Personally I feel like cd 13 is a darker test line but it’s hard to tell because they are different tests. I’m also religiously a 28 day cycle.

*control line is closest to blue parts/the bottom line*