Clomid craziness!

CeeTee • Mom. Wife. 25. 🐞Harper 4•25•17🐞 🐝Ava-Cate 9•24•19🐝
I took Clomid cycle days 5-9. Then on cycle day 11 I felt my body change. Decided to use a clear blue digital OPK test and it was at peak fertility. Then today which is cycle day 13 I took another test and it showed low fertility. I then took one a few minutes ago and it was high fertility. What is going on?? I'm so confused!