I have pain in my left arm and shoulder sometimes left side back.it is there for more than 3 weeks. I consulted a general doctor and took pain killer ...they pain subsidy but when I stop it pain comes again. Because of this i feel anxious thinking it would be a heart attack. I feel like something is stuck in my throat sometimes. If I touch sometimes I feel he pain in particular areas of the arm and shoulder and chest . I took ecg  4 weeks before it was normal.because of this pain I get a panic attack sometimes ...i feel the fear constantly...Any suggestions? Should I revisit doctor