hi... thanks for posting to healthcaremagic.. you are having fever, chills, pain abdomen, nausea,... you could be suffering from enteric fever/hepatitis A... see your physician for investigation and management.. you need you undergo the following tests.. Complete blood count, serum bilirubin, widal test, antibodies for hepatitis A and B... if widal is positive, you need to put on antibiotics like fluoroquinolones/cephalosporins, and symptomatic treatment with antipyretics, antacids, antiemetics.. if liver is affected, then you should be put on liver protective drugs like silymarine and liver enzyme preparation and multivitamins.. see your physician for this.. all the very best..