Chewing and my ear hurts?

I have no ear problems at all (of what i know of) and i have literally just sat down and popped a piece of popcorn in my mouth, when i chewed on it i got a shooting pain on my left side of my neck from my jaw right through my ear. It hurt a lot and now occasionally when i clench my teeth together, i keep getting it? It hurts so much any suggestions and what can i do? :(