Ovulation HELP!!

Ladies I need some help!!
​I've been using ClearBlue Easy Ovulation digital ovulation kit to try to narrow down even more when I'm near my time. I've been testing for over a week and still no lh surge. I have literally every ovulation symptom in the book and have for about 3-4 days! Ovulation cramps, clear, stringy stretch mucus, and sex drive increase are all very present and yet it says no surge. Have they been wrong for you before or what?! :) thank you so much!!