I think kidney stones form when your urines to alkaline? Def a connection with acid/alkaline balance from what I know.. There are definitely herbs/things you can drink to soothe your urinary tract/kidneys/reduce inflammation.. you wana get some urine test strips from the store and check the PH of your urine regularly and keep an eye on it..
You could have a prostate issue too.. Seems like a lot of the chemistry in your body is out of wack.. but it can all go back to normal. gotta figure out whats blocking it.. really look at your whole lifestyle, not just diet, emotions, everything.. do you sleep properly? at the right time, are you exposed to toxins, do you have a parasite? etc.