Hello, and thanks for your medical question on E Health Forum.
From the history provided, it seems that you might be inflammation of your liver.
The symptoms described including RUQ abdominal pain that is referred to the right shoulder, nausea, vomiting, loss of weight indicate hepatitis.
You might benefit by a few blood tests to check for the liver function tests, serology for hepatitis.
The treatment will depend on the findings of the above tests.
You might consider to consult your doctor for proper evaluation and treatment.
I hope this helps.