Hi ! Good evening. i am Dr Shareef answering your query. Possibly you have got a stomach infection which is causing the stomach pain, and the body ache due to the reactive fever. If I were your doctor, I would advise you for a routine stool test for ova and cyst, and advise you for an appropriate antibiotic and a probiotic which should solve your problem. At the same time I would also advise you not to eat from outside if you do, as stomach infection could easily creep in from unhygienic food from outside. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing health care magic to clear doubts on your health problems. Wishing you an early recovery. Dr Shareef.