Abdominal discomfort in the right upper abdominal quadrant, is probably due to liver inflammation, fatty liver or other liver conditions.
When the liver is affected, the pain isn't present, but, feeling of fullness over the liver area or "awareness" of liver.
This can be due to your gallbladder disease if it is severe pain spreading to the back of your shoulder, accompanied with nausea and vomiting.
Ask your physician to get tested for your liver functioning!