Opk faulty?

Maria • Mom of 2 💙

I tested late this cycle. CD 13 was kinda dark and it started to fade and now I feel like it’s getting dark again. This is the first time I use easy at home test I’m not sure if it’s the test or my hormones are out of wack with being sick with a migraine. Anyone ever have this happen with easy at home? Or when they are taking new meds?