Hi sheds,
I have had headaches after seizures but never one that has lasted for months, it could be possible that you had a concussion and that is what's causing your headache and it may have also caused your seizures.
A few yrs. ago I was in an auto accident and my head slammed into the windshield this caused post concussive syndrome that lasted 4 months or longer. Every day I would have wicked headaches, I had many more seizures, and my memory got worse. My Dr. put me on Neurontin but that caused me to have severe status seizures so I went off the drug and within time I found that the headaches stopped and seizures decreased. If you do have a concussion the brain is swollen and that's what's causing the headaches and possilbly the seizures. You should look into having an MRI done if you haven't had one done yet and see your neuro. I wish you the best of luck and May God Bless You!

Sue