Definately start doing the liver/gb flushes. Get "The Amazing Liver Cleanse", by Andrease Moritz and follow his protocol. Many people report passing big stones not until after after 8-12 flushes because they have to flush out all the stuff that's binding it or blocking it.
Definately don't go for surgery! Read on website about problems and risks involved with surgery (sorry don't know the link - do a search on this site.)