Please please please try a gallbladder flush before even considering surgery. Olive oil is necessary to force the gallbladder to release its load of bile, sludge and stones. You may feel somewhat uncomfortable for a day or two, but that is better than risking a lifetime of problems from unnecessary surgery.
If I were you I would do the Hulda Clark cleanse ASAP. Then eat apples and drink plenty of applejuice for 10 days to 2 weeks and repeat the flush. Do this before thinking about surgery. Your doctors will probably not support your actions, afterall, you will probably make him lose thousands of dollors. However, chances are you will gain a lifetime of better health. Good luck and keep us posted.