Test confusion...

Is there a reason a blue dye test (generic Kroger PT) would give me a faint positive (twice) but no pink dye will, and a digital said negative? Is it a false positive? Evaporation line? (Even though you can see it when inverted/tweaked?) could I just be really freshly pregnant and the hormones are all weird? I'd like to get as much information as I can. I have pregnancy symptoms, and we weren't trying to conceive per-say, and I didn't think I was pregnant until that first faint positive. If it's all in my head or just a weird batch of hormones that's fine, but I'd like to know to be better prepared in future- should this turn out to be false I'll need to be looked over by my doctor to see what's going on, and then my husband and I will probably start trying in Ernest. Thank you for any information, help or support.