Muscle pain in back in the upper left region between the shoulder blade and spine. Also occasional chest pain. Under a lot of stress right now.

Anxiety Disorder. I understand that you are going through lot of stress right now. Your muscle pain in back and occasional chest pain seems to indicate anxiety disorder which is treatable by psychotherapy and medications. Please see a psychiatrist for understanding your stresses, their effect on your body and mind, and ways to overcome the stresses.