I have had an intermittent aching pain in my left arm which runs from the top of my arm down to my hand. Its really uncomfortable and makes me feel sick. My left hand is also weak and i cant grip very well. I have no chest pains. Started on thursday 16th april. I havent been doing any strenuous exercise and cant think of any way in which i could have pulled anything. Im a fit and healthy 23 year old. Any ideas?