Had an ache/sharp pain radiating around right rib cage for 3 months + indigestion. pain worse last 3 days with diarrhea, scan shows no gallstones?

Gall Bladder sludge?: Sometimes the gall bladder can be malfunctioning even if stones are not visible. Talk to your doctor about a HIDA scan to check for sludge or other disorder of the gall bladder.

RUQ pain: Right Upper Quadrant pain with associated indigestion points to gall bladder or acid indigestion from a condition such as a Hypersecretory acid problem or Peptic ulcer, etc. Hiatal hernias can refer pain and indigestion o the RUQ too. You may have "Sludge" in the Gall bladder that is not visible on the scan you had. Follow-up with the Dr. for further eval and treatments. Best wishes.