hey, i basically went through the same situation as you, im 15 tho and i spoke to my doctor, who tested me several times, and it came out positive, i took a home test and it came out positive, and then another time it was negative...so i cant say they're completely reliable. id rather get checked by a doctor. if you havnt gotten your period yet, and your telling me your taking pills to try and regulate your flow again but no results...there is a larger percentage that you are pregnant. but id get a few opinions from doctors...hope youll be okay, dont stress too much, like you said, that might even be one of the reasons your period is late, take care<3
-alena