I need some help with my period...?

Okay I'm 12 almost 13 and I got my period a few days ago (for the 1rst time) and the flow has been rather heavy. It's hard to move around and I definitely can not run... I mean this is ******* horrible! Is this how its gonna be for the rest of my life (until menopause, I mean)?! This is REALLY BAD! I mean, yeah, maybe tampons are easier, but I am definitely not ever using those **shudder**. So am I gonna have to deal with uncomfortableness and inconvenience and not being able to have ANY fun for 4-6 day every month? Well I really do hopes the flow decreases very much cause other wise... I'm miserable. Suggestions, or anything else?! I'm really unhappy and uncomfortable.