I've had this odd headache now for 4 weeks always in the same place feels deep inside my head like some one is pushing down on it, at worse it feels like I've been hit on the top of the head. I've started to worry excessively about it, tumour, aneurism, ect as it just won't go away, if i wake in the middle of the night its there. Is this anxiety or should i got to the doctors?