Confused about ovulation tests

gina

So these are my tests for the last 4 days and this is my first time using ovulation strips. I started a little late into my cycle from what I’ve seen on TikTok, because they came in the mail a little late.

But I have no idea what I’m doing. Why is it going from light to dark every other day? Did I already miss my peak? Could my LH surge happen late in my cycle? Is it possible that CD 17 was my peak? I need helppppp