I have been experiencing severe sharp piercing pain on the right side of my skull. About mid ear level, halfway between my ear and the middle of the back of my head. It has happened several times, but only when i am laying down on my back or side and i am lifting my head ro get up or to turrn. It sort of feels like a pulled muscle mixed with a charlie horse mixed with a muscle spasm. It then feels like my muscles tense up in my head and even in my mouth. It doesnt last more than a few minutes but it does leave that area feeling a little sore. Do u have any idea what could be causing this?