Gallbladder pain left/center and back?

Ive been having left upper ab pain and pain directly into my back in the center and left as well. Accompanied with nausea vomiting 3-4 times a week and constant burping and regurgitation. Stool has been lighter than normal as well. Vitamin d is low as well even though i take 5000iu a day. This has been happening for almost 2 years. Ive had ct scans and ultrasounds that were clear and incidentally found mild fatty liver. Also had a upper endoscopy and colonoscopy which came out good aside from barretts esophagus. They think its my gallbladder but nothing shows up on scans. Im getting a hida scan in one week because the dr says some people have left pain instead of right with gall bladder issues. Is this correct? Has anyone had a hida scan that showed problems after blood tests and ct scans come back negative? Could i have a chronic gallbladder problem for 2 years?

Im hoping and praying the hida scan shows its bad. Tired of living like this. Theres no question in my mind that some people at work or even family think im a hypochondriac. I had a string of sinus problems and 3 surgeries as well between 2015-2017. The gastro drs and sinus drs have all said that the reflux and burping up food and drink could very well have caused the sinus problems.

When I had my scan the stuff I had to drink brought on an attack. I was not feeling well at all when I left there. I learned later from my dr that happens when the gallbladder is not working right. The only thing I can think of is to get another opinion.

Take care.