3 weeks throat pain, chills and fever,joint pain, fatigue and loss of appetite is an indication of what?

Please see your PCP for a full evaluation, including lab screening tests. COVID 19 should be ruled out and discuss whether infection is the cause of your symptoms. A throat exam and Strep screening test is recommended. EBV/mono and adult Kawasaki disease should be considered. In the meantime, log your fever chart, drink fluids and rest. If you develop respiratory distress, please see acute care.