If it were me in your situation, I would start on Gold Coin Grass and Malic acid tablets ASAP. Julia Chang at http://www.sensiblehealth.com
has a lot of experience with the gold coin grass.
Also, what type of Liver Flush have you been doing? Have you done a parasite cleanse? When LFs are non-productive it often means you need to do a parasite cleanse, especially if you did not do one before starting to do LFs. If you have problems with feeling like a stone is stuck after you complete a LF, it is advised to take another tablesppon of Epsom Salts to relax the bile duct again. Often times the stone will pass through. Did you try that when you felt like a stone was stuck following a flush?
Telman would probably have some more ideas for help for you, the above are just some of the basics.