My left arm has been hurting since yesterday's evening and it bothers me so much, I do suffer from Anxiety attacks, but hasn't the pain been for too long ? Any pain related to anxiety shouldn't be for too long right ? I have a rapid heartbeat because I'm scared and I have chills and sometimes sudden heatwaves, then it feels like my left arm is burning up. I don't have shortness of breath and I don't feel any discomfort in my chest, I do feel pain in my upper left back.