I've had dreams about Gallstones moving through me after I started doing these flushes. The dreams were disturbing but I can't remember why anymore.
I think it just shows what we have top on our minds. Right now you are apparently very concerned about your gallbladder and not being forced into a modified lifestyle. So your dreaming about it. Maybe if you focus on what you are doing to prevent this surgery from happening before you fall asleep you can cause your dream to change should it try and come back. It's one of the ways I've staved off nightmares in the past.
I just hope I don't start having dreams about my current cleanse. Can't imagine too many people would want to hear about them:)