This sounds a lot like me. I don't have a diagnosis, either. I have recurrent burning, pain in the kidney area, a little fever/chills. The uro sees no bacteria, and even did a cysto and said he sees no signs of IC. But what else could it be? I'll be going to a different uro in the future. As for now, I try to watch what I eat, I drink nothing but water, and I make sure to always be very hydrated. I also use OTC pyridium to help out a bit with the burning, and I use a heating pad on my sore kidneys. Hopefully we'll both get a diagnosis and a treatment plan soon! Good luck to you.