I have experienced the same thing but milder as well. Back pain, chills and night sweats after my first liver flush. I did pass a kidney stone a few months ago so I know I have them. I was afraid to do the kidney cleanse first because passing stones is such a horrific experience. But I think I will have to hold off on my next liver cleanse until my kidneys are in better shape- Hulda was right! Now I know why she has an order to all these cleanses.
I did have a colonic after passing a kidney stone and it did wonders for me- I think it will help with the symtoms.