I spent the last 2 weeks taking about 10 different tests because my period was late and I thought I was pregnant. I took 6 or 7 dollar store test and every single one had pink evap line so I thought for sure it just meant I was early pregnant. I also got to faint positive on a blue dye test. But nothing when I took the frer. I have come to the conclusion that if there is a line with color that you don't have to tweak to see, your pregnant. But untill u get that line, which should appear don't stress your self constantly over if there's a line there. That is just the hard part of the tww and ttc. If there's a line trust it. But. Just be sure its easy to be seen. If your eggo is preggo, it will appear dark enough for all to see without tweaking ! I know its easier said than done lol.