I feel for you. I had one the size of a £2 coin. I suffered the same as you, where the stone had blocked a tube. So depends on whether you have tiny little stones to flush through or one big one.
Mine was so big I had to have a stent fitted which is the most uncomfortable thing I have ever had, and the. They broke it up by sonic booms! Then I just passed it. However when I had the stent removed I ended up in a&he again!
Good luck