Please help ladies I’m so confused. Positive & Negative

Whitney

I recently had a faint line on a clear blue test. So I decided to wait a few days and test again. I took several test and all negative and then 2 digitalis and 1 is positive and the other is negative. How can this be? Has anyone ever had this happen to them before. I can’t go off a missed period because I have PCOS. Please help!