Hi welcome to the health care magic Yes all these symptoms can be from respiratory tract infection esp influenza infection I need to know which treatment has been given for your flu... You can take decongestant like antihistaminic drug and prophylactic antibiotic course Steam inhalation done three times a day Drink warm water for drinking Avoid excess spicy foods and fatty meals Take one tsp ginger juice with one tsp honey daily Salt water gargle done Throat swab taken and send for culture.. If influenza positive and if needed oseltamivir like antiviral medication can be prescribed by your physician If chest pain present then chest x ray should be done Hope your concern solved Take care