Another possibility that can explain the pain is pericarditis. It
causes chest pain aggravated by laughing yawning and deep breathing and also
causes radiation of pain to arms. Again an EKG, heat echo and chest X-ray is required.
Since I cannot examine you and know other related conditions you may be having, nor is a detailed history possible on net, I have listed the various possibilities that should be looked into. Please consult your PCP for primary examination followed by proper referral.