Hi. Neurontin can take awhile and you have to get up to the correct dose. This may not me the med for you but I know in the past I tried it and did not find relief and also had severe pressure in my head. After 2 years I tried it again and the initial side effects wore off though I am still only on 1800 but am going to work on increasing again. Have you tried any other meds?I though that gi condition can cause pn like celiec. Have you looked on that board to see as well? I know you stated you were healthy before this but have you had any other illness,injury,etc.I am assuming you have had your blood sugar tested and what was your b12 number? Anything you can think of that has not happened to everyone? I hope you feel better and I wish I had more direction for you.