One brand against two others.

K
I took three first signal tests all within a 24 hour timespan and they all have a faint line on them so I decided to test with an equate this morning and a BFN! So I decided to take a first response because pregnancy tests grow on trees right? Lol that was a BFN as well so I'm just gonna assume that the first three faint lines were just evaps but has this happened to anyone else? I know they say first response is supposed to be one of the earliest detecting test but maybe not always? Haha