Does anxiety cause pain in chest and my left arm sometime im 22 years old and one day I feel I couldn't breath then all body shaking heartbeat all over body like after some dys anxiety occur at night when I sleep a doom type feeling happened like roller coaster im my chest that causes me fear of dying ,sometime I feel heartbeat in left leg on thai area its almost 5 months im suffering from this ,im sleep good now but always feels anxious in left side of chest and left ,2 times I feel maximum anxious feel like im gone fall down on ground a force in my neck then behind head my leg gone shake etc so please tell me what to do.