Clearblue advanced digital

Has anyone used clearblue advance digital and gone from low fertility straight to peak??

I have been testing every day since day 5 and I got low (the cycle) on it everyday including this morning. But I just got this feeling all day that I was about to ovulate even though the app said not u til Sunday or Monday. Just took a test now and it’s peak (solid smiley)

I am currently breastfeeding my baby boy so I don’t know if that’s the reason I skipped the high fertility??