I had one lythotripsied 6 years ago and another one emerged that I got zapped earlier this year. And yes, there can be visible niblets in your urine if some of the stone comes out. Did you get a...

Have they checked your gall bladder? gall stones can cause serious chest pains. Not like you need some other body part to worry about, but I thought I'd mention that possibility.

Contrast CT Scan will show the stone(s) if that's part of the problem. I'm at the tail end of that nightmare right now, had a 14mm stone in my left kidney and got lithotrypsy about 2 weeks ago....