OPK help please!

Cheryl • Live, Laugh, Love 👨‍👩‍👧‍👧 #3 due 8/28/2019 🤰

I started testing on the 5th and all of my OPK'S are clearly negative with next to no second line. I've gotten flashing smiley faces on my Clearblue Advanced digital opks since the 7th. Am I doing something wrong? Shouldn't the lines on my cheapie OPK's have more of a visible second line if I am in "high" fertility? I test once a day every morning with FMU.