Hida scan showed my gallbladder is only functioning 15%! is that why my total bilirubin was always high & i have severe acid reflux? what else could it cause?

Abdominal pain.: The poor gb contraction indicates at least partial obstruction - either with gravel or sludge. This dysfunction felt usually with bloating, nausea, and abd pain can also cause hyperacidity symptoms, as well as elevated liver function tests. See your doctor.

Have you had US?: Ultrasound of the upper abdomen can show presence of sludge or gall stones, a dilated bowel duct, pancreatitis, and architecture of liver. Any of these findings could contribute to symptoms. 15% gb ejection fraction is also caused by gall bladder dyskinesia without stones or sludge. Your doctor may also want to do endoscopy. Many things contibute to symptoms in the gastrointestinal tract.