hi there, the symptoms that you have described do seem to point towards an appendicitis or cause related to gall bladder
or due to chronic gastritis
. I would suggest you to take a full course of antibiotics for helicobacer infection along with antacids to releive you of the gastritis like symptoms and if it doesn't give you any respite, instead of getting the gall bladder removed it would be better to investigate for chronic appendicitis
and get it removed. You could also take the small measures of have small frequent low fat and spice diet and going in for some kind of meditation
or yoga to calm your mind and to get over the anxiety and tension that you seem to be suffering from due to this condition, It would also be worthwile to get an x-ray KUB done to rule out any uretric stones as they can mimic an acute appendicitis
attack. Do not get disheartend and do try to get to the root of the problem. Take care.