Negative clear blue digital

Lisa • Hi I`m 25 years old, TTC baby #2 since Feb 2015. Diagnosed with PCOS, sending baby dust to all X
So I got a negative the day before my AF is due, read up online of lots of bad reviews early testing with these tests. So took it apart and I can see a faint line. I know your meant to be ver sceptical about blue dye tests and it has been sitting there for over the time limit. So guess I'll just have to retest if AF still don't show.