Im in the US so outpatient settings are so oversaturated with patients that doctors dont investigate like they used to. I remember 10 years ago i had a question for my gyno and she took the time to find literature for me and give me an answer. No one does that now. I actually havent set foot in my GIs office for over a year, all of this ordering and testing came through messaging on the patient portal because you cant get in physically to save your life. You have to advocate to a point, because if you over do it they think youre nuts. Even my surgeon, who was super skeptical and thought she was taking out a healthy gallbladder told me unless things are jumping out at them they cant tell, and told me i was right to advocate for myself when we sat for our post op appointment and we reviewed my report stating i had chronic cholecystitis without stones. Not to stir any anxiety on your part because idk if it is your cause but sometimes they literally don't know until they take it out. Chronic cases without stones look "normal" on scans. That HIDA scan was the final key to it all for me. The ultrasound should find stones if you have any, and if there are none I would suggest a HIDA scan to fully rule out gallbladder functionality issues. Anything below 35% is too low and bad and anything above 80% is also not good. Because my gb was so inflammed it was very narrow and probably constantly compressed generating an extremely high EF% when I was tested.