What does it mean my chest xray(coughing over 5 weeks) it says : there are minimal fine reticular interstitial densities of the lower zones consistent with fibrotic process. mid and upper zone clear?

Early Idiopathic Pulmonary Fibrosis (IPF) can't be ruled out by this report and likely your doctor will order for more tests such as CT scan of the chest and pulmonary function test (PFT) if chronic cough is your only symptom. However, this finding could be present if you had gotten a significant pulmonary infection in the month before and chest X-ray was done because of a lingering cough.