Sounds to me like the Neurontin isn't working very well for you. If you
can't get an appointment with your doctor, walk into his office, and tell
them you need to see him now, and you're not leaving until you do. You
sound like you are under a lot of stress because of the headaches, doctors,
meds, and everything else, and that isn't helping you deal with the pain.
I hope something starts going right for you soon. You're in my thoughts
and prayers.