my 4 years old has viral fever , cold and accute cough ,after it was relieved,earache started , after earache relieved for few days ,it again started with some thick discharge from eyes that comes after waking up. eyes got completely sticky ,child is unable to open his eyes. Little bit of chest congestion is also there . so earache , eyes discharge and thick mucus from nose ,chest congestion is there . what are the possible cause and what is it exactly