Thank you for writing to JustAnswer Health with your question.
Besides the Neurontin, have you taken any other medications in the class of a anti-seizure drug or mood stabilizer for your head aches? The reason why I ask is that sometimes when an individual has a reaction to an antidepressant where it is "activating" (depending on other symptoms you might have), it could indicate that you need a different class of drugs.
How long have you been having the headaches? What other medications and treatments have you tried
When you look back your whole life, or for the last 10 or 20 years, have you had episodes of insomnia before?
Ever had problems with mood swings, which can mean periods of depression, alternating with regular mood, or hyper periods where you were either highly anxious and irritable or hyper and feeling extremely well?