Thanks for your question on Healthcare Magic. I can understand your concern. First of all, no need to worry for major heart and lung diseases because your all reports are normal and you have left smoking. Possibility of musculoskeletal pain is more likely. So follow these steps for better symptomatic relief. 1. Avoid heavyweight lifting and strenuous exercise. 2. Avoid movements causing pain. Avoid sudden jerky movements of chest. 3. Apply warm water pad on affected areas of chest. 4. Take simple painkiller like paracetamol or ibuprofen. 5. Also start calcium and vitamin d 3 supplements. Don t worry, you will be alright with all these. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.