I Just turned 17 years old, For The Past Half A Year I've Had Severe Pain Under My Ribs My Back Hurts & I Hav Blood In My Urine. I Had A Kidney Infection bladder tests and blood tests done. They have come back negitive. my doctor kept telling me its IBS but i kow it's not he finally looked over a urine test from when i went to the ER and found blood in my urine,the doctor there said i had nothing wrong and said i sprained my back because he didnt know what else to do(as you can see these doctors dont know what they're talking about in PA). Anyways I'm Getting Really concerned. I have also had cat scans for kidney stones and didn't have any, i'm really concerned, because i always feel sick and have this pain,It also burns when i pee almost constantly and i have been tested for everything that causes that any infection (STD'S Yeast Infections ETC) The Doctors Can't Seem To Help Me! Please Help!