ESWL scheduled friday

I'm terrified of doctors and surgery. Got hit with flank pain last Friday and only morphine knocked it down. They found a 7mmx6mm stone in my upper ureter. Ive been thankfully pain free aside from some tightness in my back and light nausea since. I guess I'm just super nervous about the procedure and really not looking forward to pissing blood and sand.

Anybody been down this road before? Can you tell me what I'm in for? This is my first stone and I have otherwise been totally healthy and never had any sort of surgery or medical procedure more involved than routine dental work and vaccinations.