This is my first time using them and it will only be my first cycle off birth control. I tested three days in a row at low fertility and on the fourth it went to Peak. I should add according to the app my fertility window is the ninth through 15th. Which is part of the reason I was confused cause the sticks were saying Low.

I know everyone is different but what happened to high fertility in my cycle?

From my calculations it seemed that Saturday and Sunday should be high and then Monday would be peak. Turns out Saturday was low Sunday is peek.

Any insight would be Great!