blue dye vs pink dye??

Keara

i took a pink dye test today.. it was definitely positive! took a blue dye test about 1 hr ago (about 7hrs after taking pink dye) and it was negative. maybe a faint line? but pretty sure it was negative. i’m aware that blue dye tests are less accurate. why could this be??? so now i’m confused as to whether i’m actually pregnant or not