Please don't do the Liver Flush right away. I would refeed for at least a week. If anything apply castor oil on the right side on the liver area and put a hot water bottle with a an old Tshirt or cloth.
Also drink warm water. Break your fast as per protocol, citrus juice, tamato juice, freshly squeezed only, and build your appetite very slowly. Include apples in you food intake to get malic acid, very important for liver flush. If pain does not go away take some Epsom salt, one teaspoon with warm water, but only after refeeding for at least three days.