The package says to take 5 days before and I did 6 days before missed period, and sorry for tmi (but my urine stream was heavier than usual, could this affect the test?) I've also never used the blue dye tests before.. is this just an evap line or is this the real deal? My husband and I have been trying for a long time with a lot of disappointments, so I don't want to get my hopes up. I need your help ladies!