problem with menstruation

hey! i want to know something.

i talked to my friend (she is 33 yrs old) and i was talking to her about how my period just comes whenever it wants to and it comes VERY painful and very heavy. she told me that i should go to a gyno to check it out.

should i get a pelvic exam because of this? or is there anything else i can do for it? its annoying because i ALWAYS have to carry a tampon and a pad with me (i hav to wear both so i dont leak) and its extremely painful...i usually end up curled up in my bed and i cant get to sleep because it hurts...my mom suggested going on birth control?
i dunno it sucks cuz i like DREAD getting period is that necessary? if anyone else has had this problem and fixed it some how...how did u fix it? i just dont like being up all night cuzza cramps and always being paranoid about getting my period.

sori im rambling but my original question was what can i do for this problem and should i get a pelvic exam.

just some info btw i am 13 yrs old and i started my period when i was 9 and a half.

any help would be greatly appreciated.

xoxo-mariah

girl12