Multipilot -
Without knowing your age, medical history, family history, etc.., anything online here is total speculation. Being seen by a Urologist was a good move, but unless they deal with a pilot population routinely their impressions and advice are limited. Not by lack of intelligence but lack of knowledge in the Aerospace Medicine realm. I agree with some of the other posts in that you can get back to flying but the hoop process can be exceptionally frustrating. As we all are aware, the back of every medical certificate lets us know that we are to self ground ourselves during periods of medical illness, regardless of cause. The whole concept with grounding someone with renal calculi (kidney stones) is flight safety..... no big surprise here.... If you happened to be in the air with a student and had an "attack" it could have an unfortunate outcome. Your biggest risk factor at this time for having another kidney stone is a HISTORY OF A KIDNEY STONE. Getting into the loop with virtual flight surgeons in Colorado (or someone equivalent) might not be a bad idea if your AME is not a specialist in Aerospace Medicine..... not to suggest that he/she is a bad physician but in situations like yours you want someone who practices in this area exclusively..... Best of luck and hope you never have another stone.....