Help!

Ok i am 19. i have a very irregular period. been bleeding for 2 months and shows no sign of stopping and is EXTREMELY heavy! i also get very bad abdominal pains mainly on the left side, headaches, hot flashes, fever, a yoyo metabolism. with my period for the past 2 months it has technically stopped but only for 2 days at a time and it would start back following sex or excercise! this has been going on for a year now and i need help trying to figure out what is wrong with me. friends say endometriosis or cysts but i have no clue.! my mom did have cervical cancer and thyroid problems! could this be something major wrong with me HELP! THANKS BRITT