Common Cold, Flu, Pneumonia or Bronchitis?

Hello! I am ill almost two weeks, in a current of all time the temperature does not rise above 98.6, the basic problem - lungs: damp cough with mucus, in the first week was dry cough and voice loss, but mustard plasters have helped, now I accept antibiotics and cough remedies. Prompt, whether a flu it? If is not present, that it can be judging by symptoms? How to treat?