Is there something wrong with my brain?!

I constantly crack my neck. I've been trying to stop, but I always come back to it. Now, I just move my neck around to relieve the tension that builds up. Anyways, recently, i've been having some headaches, but from time to time, there is a sharp pain on the side of my head. Towards the back of the head. Is this sharp pain a sign that there is something wrong?