I would get back to your doctor and tell them what is going on. Have you heard anything about the new "oils"? There is a massage therapist in our area that uses these and they are working wonders.
Hun how are things going with your bf? The migraines are more than likely stressed related. The same thing happened to me during the active addiction in my home. I was so physically sick with migraines and panic attacks.
Are you going to alanon meetings, counseling, exercising, eating properly, sleeping? Taking care of you?
Here is a link to the drug facts....
http://www.drugs.com/topamax.html
Just a comment though...you should always research a medication prescribed prior to taking it. Best wishes!