I think I may have found the problem. It happened again but not as severe, and I also had high blood pressure. I have high blood pressure pills to take when my pain gets severe. I had high blood pressure the first time I had the breathing problem as well, I just attributed it to my arm pain. even though my arm pain was minimal. Yesterday when my breathing got difficult I took my blood pressure because I also felt a little dizzy. It was 153/91 so I took a bp medicine and after a while my breathing got a little better but not completly better. I also have had blurry vision, extreme exhaustion, chest(lung) pain, and a racing heart beat lately. Now my question is do I go to ER today or wait til monday to see my Dr. agin?