Is it normal to experience a spike then a decline like this?

Natalie • Mama to a👦 7/18/17, 👼🏻 9/26/18, 👦 8/2/19, 👧🏻 7/29/2021, 🤰 due 8/5/2023

I know there are not enough temps to necessarily judge but I feel like I ovulated earlier this week however my temps after have so far been way down. I don’t know what to think...