Thanks for your question on Healthcare Magic. I can understand your concern. Cough, chest pain, breathing difficulty etc are suggestive of lung disease (infection or bronchitis) more. So consult pulmonologist and get done clinical examination of respiratory system, chest x ray and PFT (Pulmonary Function Test). Chest x ray is needed to rule out lung infection. PFT is must for the diagnosis of bronchitis. If all these are normal then possibility of muscular pain is more likely. So apply warm water pad on affected areas and take painkiller and muscle relaxant drugs. Don t worry, you will be alright but first rule out lung diseases. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.