A good friend of mine has cronic kidney stones he made it back after having a couple of surgerys and a changed diet. Ill shoot him a message and try to get some info. MY BEST ADVICE IS get in contact with a Airman Medical Examiner NOW!!!! Get them into the loop. Perferably its a guy that only does medicals since they seem to care about their pilots more. A Lot of time the back ups in getting back in the cockpit is that you didnt have them there to make sure certain screening, procedures, and documents were done at the right time.