Hello. I m sorry you don t feel well. It isn t possible to diagnose your condition without an examination, but several thoughts come to mind: A viral illness could account for your symptoms. There are a number of viral diseases that are associated with fever, headaches, body aches and right upper abdominal pain -- which could be a symptom of liver inflammation -- including infectious mononucleosis ( mono or glandular fever) and hepatitis A, B or C. Certain bacterial or parasitic infections, such as Mycoplasma or amoebae, can cause liver inflammation, too. These infections typically trigger fevers and body aches, which we call constitutional symptoms. Autoimmune hepatitis, such as that caused by inflammatory bowel disease, lupus or rheumatoid arthritis, can present with fever, right upper abdominal pain and constitutional symptoms, as well. Finally, gallbladder disease is a classic cause of right upper abdominal pain, and it occasionally presents with a fever, especially if the bile ducts are obstructed (such as by a gallstone). In any event, your symptoms are a bit worrisome, and I would suggest you see a doctor at your earliest convenience. Further investigation is warranted here. I hope that helps, and good luck!