I have had problems with headaches on my left side of my head before.  At that time I was prescribed prozac which seemed to handle the headaches.   However, now the pain is located higher on the left top of my head and more constant and it's sensitive to touch.  Also, when I'm blow drying my hair, the heat from the dryer causes a shooting pain.  I've been experiencing double vision which is most noticeable when I'm sitting and concentrating on a movie or television and is ok when I cover either eye.