Hi. I Have Had Food Outside And Since Then I

Hi. I have had food outside and since then i am having pain in middle of my stomach just below my chest. I took Norflox 400mg for 5 days and was almost cured. But fever kept on coming back and i had to take 2-3 calpol 650 daily to control fever. When fever starts i get coughing too. Recently i visited another doc and he gave me another antibiotic Topcef Clav 200. I hv already taken it for two days but still no relief in stomach pain or . fever. Got my blood and stool test done twice. Only anamoly is increased platellete count and Wbc. Rest everything is normal.Pl suggest.