Af due 6/25 35 day cycle but ovu test says high fertilization???

Natalie • Sun, May 31

Someone help! Bought clear blue advanced ovulation test and it says high fertilization. I have a consistent 35 day cycle. Technically I'm not supposed to be fertile until the end of this week!!!! Now I'm all thrown off. Maybe my cycle is shorter this month?? I don't know. Got my period may 21.