Thanks for your question on Healthcare Magic. I can understand your concern. By your history and description, possibility of post infectious bronchitis is more. Bronchitis (inflammation of airways) is common after viral upper respiratory tract infection (URTI) like cold. And bronchitis can cause cough, congestion, phlegm and breathing difficulty, similar to all your symptoms. So better to consult pulmonologist and get done clinical examination of respiratory system and PFT (pulmonary function test). PFT will not only diagnose bronchitis but it will also tell you about severity of the disease. And treatment is based on severity only. You will need inhaled bronchodilator and inhaled corticosteroids. Mucolytic and expectorant drugs are also helpful. Don t worry, you will be alright with all these. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.