I have been coughing for 3 months now I've tried self medicating but there's no change.what should i do

 
Chronic cough can be due to several causes. You will have to find out the cause of your chronic cough before treating it. Asthma, allergies, smoking, exposure to smoke and dust, certain lung disorders can all give rise to chronic cough. Tuberculosis is an important cause of chronic cough and should definitely not be ruled out, especially if it is common in your region. Self medication will only work so much and no more. You must consult your doctor, get evaluated and then you can be treated appropriately.