Topamax and extreme nausea

I am in the relatively new group of people taking Topamax for migraine. I have not been taking it long-- in fact I'm still in the titration phase at 25 mg working my way up to 100 mg/day or perhaps 200 mg. I'm already noticing several side effects.

I've had extreme nausea. Carbonated water tastes absolutely disgusting. I'm starting to experience mild tingling in my extremities but nothing too bothersome. I've had some hand tremors. About 30 minutes after taking the meds, I am overwhelmingly tired. When I've been driving, I feel out of it-- as if I'm not really driving and I'm completely disconnected from the experience. I've also noticed that I'm having difficulty getting words out. I can think of the words but I cannot manage to articulate them. Generally speaking, I just feel out of it during the day-- like I'm wandering around in a haze. On the plus side of things, I haven't had a migraine or much aura since I started topamax. However, because of the side effects, I about ready to throw in the towel and search for a new drug for my migraine and aura.