The various causes of patch on a chest xray when you had chest pain as the chief complaint could be emphysema, pneumonia, tuberculosis, lung abscess
, rib fracture, lobar atelectasis, malignant lesions etc. wait for the meeting, carry any old xrays or other imaging studies of chest for comparison. Make note of any constitutional symptoms like fever, cough, and weight loss. Consult a pulmonologist after your physician. Management would be according to the cause. Hope this helps. Take care.