How would u diagnose a persistant cough after having an invasive fungal infection of the lung. Peak flow fine. Beta d glucan level > 120. Scans fine.?

Pulmonologist. This is not a question that can be adequately answered on the internet. Your problem should be reviewed in depth by your internist perhaps in consultation with a pulmonologist.
Chronic cough. The most common causes of chronic cough are: ace inhibitor blood pressure medicine like Lisinopril or enalapril, gerd, chronic postnasal drainage and cough variant asthma.