HI welcome to the health care magic You are on medication for upper respiratory tract infection Probably taking antibiotic and decongestant for your condition... You can have drug induced nausea like feeling secondary to gastritis For that pantoprazole for week cam be prescribed Avoid gastric irritants like... -Excess spicy foods -stress -Smoking -Excess tea, coffee Cooked oatmeal help in soothing If after few days stomach problem not solved than USG like investigation done for further work up Take care Consult physician for examination if needed with keeping all this in mind Hope your concern solved