excruciating sharp pain at back of head

hi, i have this also but mine only lasts 5 - 10 seconds of excrutiating pain then goes away but i have many other symptoms too, all of which are getting worse. I have just left a post about it, hopefully someone can shed some light on this.

i have been having excrutiating sharp shooting pains for the past 3 years, and i get them nearly everday they last a few seconds then go the repeat them selve all day, also i have alot pain in different parts of body but not as bad as my head, also i get alot of headaches, i had been to doctor he told me it was from anxiety this was 3 years ago, but it scares the hell out of me everytime i get them because i think i might be having brain hemorage,but i dont what it is, sometimes i want to just go out in an open space and scream out loud, to get rid of it. (((