I have had kidney problem since I was about 13 and I am now 36. Very seldom do I ever test positive for uti or anything for that matter. It is very frustrating but do not give up. Perhaps you should find a different doctor. I am going to have a kidney removed and all this year my primary doctor refused to treat my kidneys. She gave me muscle relaxer etc for "back pain" finally i am at the point that if a doctor says "so you
think it is kidney pain" I sternly say "No I
know it is kidney pain" I have lived in this body for 36 years and I know a little bit about it. Even my uroligist tried to tell me that my bladder discomfort was due to female problems. 2 weeks later he removed a very large non-malignant tumor from the right side of my bladder

Sorry that you have to go through this but trust your body....it will let you know when somthing is not right

Kim