This is just a guess, but maybe you flushed out some sort of toxin, or maybe backed up bile that you did not pass and is still reacting in your gut. One thing you can do, although I kind of hate to suggest it, is to take an Epsom Salt drink to clear your colon. If it is something stuck up there, hopefully it will come out. I never had unusual gas with my liver flushes, but I have had slower than usual BMs. The dreaded ES cocktail always solved the problem.
Hmmm..maybe if we called the lax. drink a cocktail and served it in a fancy stemmed glass with a little umbrella and a lemon wedge it would taste better. Naw..probably not.