Sorry to hear about your predicament. Several thoughts come to mind to explain what's going on. Musculoskeletal trauma could certainly explain stabbing pain w/movement of your right arm. Rib fracture, costochondritis and/or bruised/strained intercostals could explain pain w/breathing. However, so could (spontaneous vs traumatic) pneumothorax (air in the wrong part of the chest cavity) which could make it difficult to breathe. As would inflammation of the pleural lining of the lung & chest cavity, otherwise known as pleuritis. Infection & trauma could also irritate the pleural cavity. On the outside, if you've noticed blisters in a row on your skin, then you might have developed shingles (or reactivated chickenpox). If this pain persists, best to go see your family physician, sooner especially if you feel short of breath, develop fevers/sweats/chills, etc. Good luck!
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