Did you do any water based colon cleansing after the flush? some people are very prone to getting the stones that flush out of the liver lodged in the colon. If it happens, it will be a huge drag on your health, and will make you quite ill. Andreas Moritz recommends a colonic after a Liver Flush for this reason. At the very least, a series of water enemas massaged to get the water all the way into the ascending colon (you can do handstands ect to move the water around). It honestly sounds to me like you have something stuck... need to wash it out asap.