I've had a sore/numb/tingling left arm for over a week. My left shoulder hurts and it's gets really sore when I use it/driving especially and hurts when I tense up. I've noticed my neck going stiff on the left side and my face feels tingly too. I'm thinking I've pinched a nerve or it's just muscular pain but the little voice keeps telling me it's something serious. Just wondering if this is common?