Blue dye tests? Input ladies.. Please

OK ladies a couple days ago I posted a faint positive pregnancy test and some lady told me the blue guys are bad because sometimes they produce false positives has anyone had this before I'm pretty discouraged because I have brown discharge a week before my period is due and light cramping. I'm going to go buy a pink test tomorrow but I didn't know if this happened to anybody else. I am really discouraged I want this miracle to be so bad I'm going to retest tomorrow because I waited two days but I'm pretty upset if it's just a false positive.