Thanks for your question on Health Care Magic. I can understand your concern. No need to worry for heart diseases because your ecg and stress test are normal. Sometimes simple musculoskeletal pain can also cause similar symptoms. So avoid heavyweight lifting and strenuous exercise. Avoid movements causing pain. Avoid bad postures in sleep. Take painkiller and muscle relaxant drugs. Apply warm water pad on affected areas. Don t worry, you will be alright with all these in 1-2 weeks. If not improving then get done chest x ray to rule lung related causes. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.