Opk confusion :(

So... To try and keep things simple. I am currently on my second cycle of clomid. I am also barely over 3 months PP from 18 week delivery. Last month. I ovulated without a problem on cd 21. Confirmed with opk.

CD19 last cycle.

Cd 20 last cycle

This cycle has been a little different. I had some uncomfortable situation down there. Thought maybe a yeast infection or possible chemical burn from a hair removal product I use on my butt 🤣🤣🤣🤣 I didn't have sex for a week and then once I did. I spotted right after on cd 12. It was just after though. So I started tracking opks sooner then usual. I usually don't start tell Cd 18 tell cd 21. Surge is always on CD20 confirmed by opk. Well this cycle on Cd 17 my test was as dark as my test on CD 19. I assumed I'd be ovulating today on CD18. But it looks like my test has gotten way lighter. Should I keep testing? Did I miss my surge this cycle? Has then happened to anyone else and then the test got darker? I cramped today I thought maybe ovulation. I'm just lost. Needing advice. Thank you in advanced.