Gradually worsening chest pain over 48hrs, with history of productive cough over two months, precede by dry cough on n off over last year.

Chronic bronchitis. Your symptoms are consistent with chronic bronchitis. The chest pain may be related to this, but it may also be a separate problem that should be investigated by your healthcare provider. Chronic bronchitis can be due to environmental smoke or particulates; in the us the most common cause by far is from cigarette smoking.