hi i have a viral infection , i have been to the doctors ,he gave me a syrup which i have finished .my cough has lasted over 2 weeks ,i keep coughing up flem regulary and have got chest pains and back pain from this .I have also used a water bottle to relieve the pain please help .I have the other symptoms too such as fever ,chills,body ache ,blocked nose ,head ache .these have all gone except the coughing up of flem and chest pain.