false positive maybe?? very faint

Hi guys so I know this seems a bit ridiculous but it’s really bothering me so I haven’t been feeling well a lot of headaches and dizziness and I’m on birth control so I’m not trying to get pregnant... I’ve heard that these blue dye test give a lot of false positives what do you guys think? Do you guys ever get a faint positive like that and have it be an actual positive test?... Thanks for letting me know...