My skin feels sunburned on the left side of my back and left side of my chest but there is nothing there. My underarm is very sore to the touch. I have had some chest pain and difficulty breathing, but its very moderate. I also haven't had regular bowel movements. This has gone on for over a week. I am stressed and attributed the chest pain to stress or a panic attack but its been over a week and now Im wondering if it is more than that.