I have been taking Topamax 75mg twice a day since the end ...

I have been taking Topamax 75mg twice a day since the end of April 2009. On some nights, just before I fall asleep, my mind begins to race. These racing thoughts continue for an indefinite period until I get up with a headache. I’ll take something for the headache, read for about a half hour or so and then go back to bed. Now I sleep to morning. When I arise, I forget the thoughts that had raced through my head the previous evening, which is good, because many times these racing thoughts are angry thoughts. Now. For the rest of the day, I am wasted, like I had not had a good night’s sleep; like I had been very active during that time that my mind was racing. Note that these ‘racing thought’ episodes do not occur every night, nor immediately upon bedtime. They sometime occur if I rise to use the bathroom. They may not even be related to Topamax. They ONLY started right around the same time as I started using that drug.