What could could be wrong when i have all the symptoms of a uti but went to doctor and don't have a uti it's been going on for.months?

Possble Interstitial cystiti: Is possible to have symptoms of urgency and burning and the need to go frequently secondary to an inflammatory condition of the bowel known as interstitial cystitis. Also, crystaluria can cause irritation and is related to over secretion of cystine-much sofa can contribute. I would recommend seeing a urologist before starting any further antibiotics to treat an undocumented urinary tract infection.