important thing to rememberis that everybody reacts to this process differently
I definitely feel better while chelating, specifically my head feels clearer and my mood is improved
As far as your kidney goes, I would recommend you do a kidney cleanse during one of your OFF periods. Dr. Schultz has a good kidney/bladder tincture. You could also do a Hulda Clark type kidney flush
One way to relieve some of that kidney pain is to drink LOTS and LOTS of water during chelation. This will make it a lot easier on your kidneys, and lessen the pain