Considering 3 day urine fast for kidney concerns

I am a 25 year old male who has damaged his kidneys. The story goes like this: I came down with Chronic Fatigue Syndrome and began developing MS symptoms, so I was very zealous about treating myself. I heard about doing a heavy metal detox, so I began an herbal regiment from my local health food store, then in my over-zealousness I began taking very hot cayenne pepper pills as well. After a couple of days of that, my pee became very foamy and yellow, so I stopped taking the pills... but the damage was already done. So far it's been about 4 months and my pee has remained very foamy and sometimes yellow. I started drinking about 1/4 cup of my urine every morning about a week ago. It helping tremendously with my Chronic-Fatigue-Syndrome and MS, but my pee is still yellow and foamy.

I was thinking about a 3 day urine fast. Is anyone of the opinion that that might help my kidney's heal? Also, is it necessary for me to take a laxative while I'm on the fast? Or is that just for prolonged fasts?