OPK readings

Hi! I’ve been using the clear blue ovulation kit this cycle with the smiley faces - I’ve been getting high fertility readings for 6 days now and the past two days I’ve been testing 3 times a day but no peak. Currently CD18, normally a 29-30 day cycle but can be up to 33 days on occasion. By the looks of these lines does it look like I’ve missed my peak?! 17/07 looks darker to me than the 19/07 PM test, all are dry! Worried I’m just not going to ovulate this month if the lines are truly getting lighter!