I have experienced the same kind of relief by using the heat of a hot water bottle over the liver/gb area. I really believe that this is a great therapy for your body, and it seems to relax the ducts, which helps alleviate the pain. Also, you might try having one tablespoon of Epsom Salt dissolved in a cup of water. Be sure to drink it right down, even though it tastes horrible!
Hope you are feeling better and that you will continue with the liver flushes! I've done four now and, although I am not yet stone-free, my pain is completely gone! Praise God!