Try liver flushes, they really help. You can always operate it if you really have no other choice. Give flush a try!
Read more posts here. There are a lot of people who fixed their gall bladders without operation. There are a lot of people who really regret that they found this site after they had their gall bladder removed.
At least postpone the operation, read more, try flush and then make your final decision. Operation is the last thing you should do.