Hello I share your concern Coughing and inflammation might not be caused by infection only. It could be viral or allergic You need to identify trigger for an allergic reaction if you can pinpoint any. You may require another course of antibiotics like calrithromycin or Penicillin group of drugs under supervision when azithromycin is not working. Here I would advise you for an X rat chest and sputum microscopy with blood profile for ESR and CBC Meanwhile do take steam inhalation and deep breathing exercises Please write back to me with more details like your age and relevant medical history So that I will be able to tell you more precisely. Best regards