My left arm movement acting crazy involuntary....making typing on a keyboard more difficult as it's lifting off the keyboard, my arm that is........on my driving lessons, i cant keep it still when steering, so my right hand is gripped harder...and if I try and do so it causes tension down my left arm and in the armpit area (deltoid, pec major) on the front face part of chest, pain is felt.....apparently my instructor has seen my arm shaking though I haven't. ANY NEUROLOGISTS is there any home remedy?