All these questions won't really make any difference if you don't have to have the surgery, will it?
Just to give you my synopsis, I was also told I'd need gallbladder surgery. Only I had cysts in my gallbladder. I thought,"what the heck, I may as well try the liver cleanse." I had nothing else to lose. Three weeks of parasite cleansing plus the liver cleanse left me feeling pretty good.
I went back to my doctor to have some further tests and they couldn't find anything wrong with my gallbladder anymore.
Maybe you should do this then go see your doctor again?