No LH then PEAK??

Karli
Yesterday my digital OPK said no surge big blank circle which I expected bc I normally ovulate CD12 today is CD10 so to my surprise it said peak today! Solid smiley! Wth? How did I not get the high fertility flashing in between??? Could there be a mistake and I'm not at my peak?? Of course I forgot to bbt this morning! Ugh