s say you wake up
anxious and have chest pain whenever you are laying on your side, and your
heart is racing, or some other more borderline abnormal symptom --- then I would ask your doctor. Arm not getting enough blood = obviously no issue if you have been sleeping on it, but it could be independent of other symptoms. But if anxious, or having chest pain, and/or maybe you have risk factors that havent been looked at in a while, this is not the result of lack of blood flow to the arm.