Welcome to Healing Well. Sorry to hear that you have been suffering with this. "200mg per day of Topamax should be sufficient to bring the pain down at least a bit for you, but it does not work for everyone. It sounds like the Topamax does not suit you.
I am a little reluctant to suggest anything else because you developed migraine after strokes, and care is needed to find the right medication to give you because of the strokes! Sometimes we have to go back to the Docs time and time again before they will listen. Do you keep a diary of your attacks, if not, it may be helpful to do so to enable you to get your point across! Let me know how you get on?
Co-Moderator of the Migraine/Headache Forum