Unless it becomes an emergency.

Yes, the gallbladder could very well be causing the nausea that's causing your lack of appetite. Stress & our physical wellness are directly correlated. I'm sure you will be feeling much better when they get that taken care of. How wonderful that a thread here on PC clued you in. PC is a wonderful place for all kinds of information.

Take care of yourself & try to eat the foods that you can tolerate just to keep your weight somewhat stable & also let your Dr know if you st art to loose too much. Might help your Dr determine a higher priority for your surgery.