14 day period😩Still goin

My period usually only lasts 6-8 days but it’s been 14 dayssss. It started out light for about the first 5-7 days but got heavier. This period is sooo heavy, the clots are bigger than quarters. I have to change my tampon and or pad like every 2 hours. The cramps are so bad i feel like i’m dying. My period shows no signs of stopping😩😩😭😭I’m going to disneyland on the 22nd! Masturbating seems to make it heavier but i keep doing it because it soothes pain. What should i do? (im 13 btw)