I had had 3 urinary tract infections, after the third the symptoms would not go away. I discovered interstitial cystitis on the internet and thought that was what I had. After almost a year I read a book about candida and discovered that was probably what I had. Yeast infections in the digestive system can a cause a range of symptoms including a sore irritable bladder, alot of little things I had wrong with me but never really thought they could be related. I had been on the pill and taking antibiotics for urinary infectons as well as a high sugar, high bread diet I have since discovered were the cause of it. I couldn't get rid of it by changing to the diet so I am now on medication and am starting to feel heaps better, especially my bladder. Medical tests for it are usually negative and mine was but I was convinced that this was what was wrong with me. I wanted to share this in case anyone has the same thing, I would be happy to give some more info for those who are interested.