Hey there. I heard a couple testimonials from people who had the same issues as you. Recurring kidney stones, and they began using a good calcium supplement and now no longer have this problem. This sounded strange to me. I listened to a presentation by a doctor and he said that when there is not enough calcium coming from the diet over a period of time, the parathyroid gland secrets a hormone named parathormone which causes calcium to be takes from the bones and put in the blood, but because this mechanism is not perfect you can have too much calcium being dumped into the blood. Then then the calcium gets to the kidneys it combines with other things like oxylates and then u have a kidney stone being formed. Solution is, calcium supplement and it seems to work for quit a few people.