Thanks for your question on Health Care Magic. 
I can understand your concern. 
Possibility of 
bronchitis is more in your case. Bronchitis is common after viral upper 
respiratory tract infection (
flu). 
And your symptoms are classical of bronchitis. 
So better to 
consult pulmonologist and get done clinical examination and PFT (Pulmonary Function Test). 
PFT will also tell you about severity of the disease. 
And treatment of bronchitis is based on severity. 
You may need inhaled bronchodilators and inhaled corticosteroid. 
So better not to take inhalers without prescription of doctor. 
You may also need antihistamine, 
mucolytic and expectorant drugs. 
So consult pulmonologist and discuss all these. 
Hope I have solved your query. 
Wish you good health. Thanks.