Being doing some research, thinking gout. Kidneys have had a slight pain last few days, and gout supposedly can cause that. I'm eating a lot cleaner and stopped drinking beer, so I'm thinking it's the whey protein. Apparently taking too much can cause a flare up. Been drinking 150 grams a day (3x50). Need to get some blood work done anyway, guess I'll get them to check for uric acid too