ovulation

So I took my ovulation a bit early this month and near enough got peak straight away , a thought carry on testing because it was early and for the rest of the tests I was getting high fertility does anyone know why this happened this month ? I usually get nothing then high then peak and then goes back to blank circle again so unsure why it's different this month , currently got 7 days till I can test But also another 7 days till my period so the app says