there are many potential causes to this including a nerve problem. given how long it's lasted and the fact that is hasn't gone away it's time to get your doctor to check you out. you need to have an examination by your doctor to determine what follow-up tests you may need to get to the bottom of the pain. as you said these aren't typical headaches and the description of your symptoms does not automatically point to something in particular.
i have been having very sharp stabbing pains down through the top rt/rear of my head. the pain almost knocks me down. i have been having these pains for 6-7 weeks. i have had no previous head injuries. they just started out of the blue. they are not headaches they are in. . a dime sized spot on top of my head right side just off center back portion top of head. does that make any sense? these pains happen wether. . i'm standing or laying down. thank you for your time.