Hi welcome to HCM.. You are diagnosed as upper respiratory infection .... Here it could be from viral or bacterial cause ... If it is viral cause than antibiotic not effective .Only symptomatic management done ... Salt water gargles done . More water . Avoid smoking. .. Take benadryl like decongestent . If inflammation more than short term steroid might needed .... Steam inhalation with eucalyptus oil useful. If condition worsen than further work up with chest x ray and sputum examination done ....to rule out other etiology like pneumonia , fungal infection , TB etc.... Hope your concern solved . Advise ; pulmonologist consultation for examination