Your symptoms could be SO many things including sludge/stones in the CBD, gallbladder/Post-Cholecystectomy Syndrome, Sphincter of Oddi Dysfunction, Small Bowel Bacterial Overgrowth, pancreatitis
The metallic taste is common with pancreatitis
, duct, gallbladder and other biliary problems. So are the chronic back pain radiating to your middle back and right shoulder blade, irregular bowel movements, fatigue, frothy urine and abdominal pain. [I have all of that.