Ovulation confusion

Hi there! This is my first month using ovulation test strips. I was testing once a day for about a week and then twice a day until today.

I’m confused though... I thought I’d see a spike of some kind but I didn’t, really. The biggest surge was yesterday morning but even that looks like it wasn’t that high. Was that my surge? Last night and this morning’s are not darker like I thought they would be. Glow has predicted me to ovulate today, so it would make sense if the surge was yesterday, right? Should I keep testing to see if I might be ovulating late?