Topamax and bummer

I started taking Topamax a couple of weeks ago, but decided to make the decision to stop taking it.
Typically, I am a very quick, sharp thinker, but not while on this medication. I became very forgetful, almost absent-minded, and confused. And, the mettalic taste in my mouth was very unpleasant. I drink a lot of diet soda, a real bummer to discover it's flat taste. Also, a couple of days prior to my quitting it, the fingers in one hand were feeling numb.
If these are just the beginning of the side effects, I am saying no thanks to Topamax. There has to be something better out there with less side effects.