Hello welcome to the health care magic Usually most of upper respiratory tract infection are viral infection and if care not taken secondary bacterial infection can occur Here sore throat, fever present so gram positive cocci infection should be ruled out here.... For distinguish between viral and bacterial following tests useful... _throat Swab _ASO titre _CBC Your Auscultation also should be done Decongestant can be prescribed for congestion relief Vitamin C lozenges useful Avoid excess spicy foods Drink more water If needed from above reports antibiotic course can be prescribed Take care Hope your concern solved