Ovulation Tests

Aliana
Hi Ladies!
I have been taking an ovulation test (clearblue advanced digital) since mid February. I had my Mirena removed mid February. The first month, I had one peak ovulation & 15 high fertility days. Then I got my period & got a peak fertility lay Friday (april 3rd). Sunday, Monday, Tuesday AM all zero fertility. I tested Tuesday before bed for the heck of it & got another peak fertility. Has anyone had this happen before? Is this normal? Or could I be pregnant?