Why am I still fertile?

Me

I’m using the Clearblue advance OPK and this is my second month using the app and it’s still showing I’m in high fertility after 7 days.

Last month I was fertile for 5 days and then ovulated, and then I can’t test day after ovulation but I checked the one after and it said low fertility.

Red is period

Grey is low fertility

Light purple is high fertility

Dark purple is ovulation

The number is my cycle day