I have always had problems with high oxalate foods. In my twenties, my kidneys were always giving me problems. I had frequent kidney infections and would constantly push myself to drink water. In my thirties, it got worse. The only remedy that I found to reduce the pain, with what I determined as kidney stones, was pure lemon juice. If you have problems with some of these same things, check out this site. See the link:
How True Lemon Helps Support Your Urinary Tract Health