Hello there, I am dr.milan an infectious disease specialist answering your question, As suggested by your history i feel you have respiratory infection. It may be confined to the sinuses called sinusitis and may also with pharyngitis. Your associated symptoms like fever and headache supportive to that. You need to take decongestant along with any painkiller for 5 days. And along with you take tablet azithromycin or any equivalent antibiotic for 5 days according to your physicians advise. This is look like bacterial infection so antibiotic is needed. Usually in viral more than one system involvement is seen, which is not here so it is mostly a bacterial. Take rest and eat healthy diet for few days. Avoid any cooled drinks, water and food. Hope i have given appropriate guidance to you. if you have any query you can consult me anytime. Give me star rating according to your satisfactory level. Thanking you.