I Have Painon The Left Side Of My Head. The

I have painon the left side of my head. The pain is in the very back of my jaw adjacent to and just below my ear,my ear is chronically congested and slightly sore, and the pain radiates in a narror band on the top left side of my head from rear to front. The top of my head and my jaw are tender to the touch and it is uncomfortable to sleep with the left side of my head on the pillow. I have been like this going on two weeks now. There is no pain or irritation in my nose or throat. What could this be?