Have you been advised to modify your diet? It might depend on what your stones consist of, but some people are encouraged to limit salt/sodium and/or oxalates in their diets.

I haven't had kidney stones but have known those who have, and they are excruciatingly painful.

Here is a site with a lot of information you might find helpful:
Diet for Kidney Stone Prevention - National Kidney and Urologic Diseases Information Clearinghouse