extremely heavy period flow

hello! im 15 almost 16 and i got my first period a year or 2 ago but it stopped for almost a year, came back, and then stopped again before near another year, yesterday, and it is REALLY heavy today. I used a Cora super pad and an Always super tampon AND period underwear all together and i bled through my pants just slightly after almost 3 hours. my guess is that it’s super heavy because i haven’t gotten it in a while, but it’s really stressing me out at school about bleeding through my clothes so im not sure what to do for the few days it’s really heavy. are there any certain brands of tampons and pads i can use that wont make me bleed through after 3 hours? thank you so much