I am 61 yr old female. I am haveing pain under my left shoilder blade. in the evening it travels to my arm pit and tingling down my left arm. I have in the past experienced numbness and tingling in my right arm like my whole arm went to sleep. that wakes me from sleep. i can relieve the numbness in my right arm by stretching it outperpendicular to my body, arch my back and stretch my left ear toward the too if my my left shoulder. But this left shoulder pain is under the blade