What Causes Bleeding From Vagina With Stomach Cramps?

NAME IS MYA AGE IS 17 I HAVE BEEN BLEEDING FROM MY VAGINE FOR 2 WEEK AND 4 DAYS BEEN HAVING
REALLY BAD CRAMPS IN MY STOMACH AND MY KNEE ARE HURTING ME I HAVE BEEN TO THE HOSPITAL THEY HAD TAKING BLOODED FROM AND URIN ME BUT SED THEY DONE NO WHAT WORNG WITH ME SO SENT ME HOME WITH TABIET’S THAT DON’T REALLY WORK I HAVE BEEN BURNING UP FEELING VERY WEEK AND SLEEP A LOT WHAT COULD IT BE PLEASE HELP I THINK I AM DYING