I have a sharp contracting pain in my head that comes and go and lasts about a second, originally had an earache as well but that is now gone.?

Tmj: You likely have tmj. A way to tell is to open and close the jaw with a finger placed in the TMJ socket which is roughly the pocket created when one opens the mouth and places a finger directly in front of the ear canal right at the level of the sideburns. Softer foods, warm compresses and Motrin should help. Avoid gum chewing. Other option is migraine.

Other things too: There are other conditions that could cause what you are describing including a tooth ache, a muscle pain, and a nerve disorder. I would suggest seeing a dentist who can diagnose the cause of your pain. Consider www.Aaop.Org and www.Aacfp.Org for a list of dentists who can.