Hi, Did your doctor do any testing? If not, please find another doctor fast. No doctor can say, without proper testing, that your chest pain is due to posture. I have chest pains once in a while, but my doctor checked me out and told me that the pain is because my osteoarthritis has extended to my ribs. Your symptoms do not sound like you are having posture problems or osteoarthritis pain. Please remember, not all doctors are good. Hope this has helped you. Good luck and let me know what you find out.