I took Topamax 400mg daily and I only had that "off" feeling (I wouldn't describe mine as high, exactly) when I would increase my dosage or if I stopped completely and started over (when I lost insurance and had to quit taking Topamax altogether)
FOR ME, the "Dopamax" thing came from an overall "fog" as well as "losing words" where I would be in the middle of a sentence and be completely unable to come up with words like 'ambulance' or 'garage' It was weird, but FOR ME, Topamax Helped me tons and I would not have quit taking it just because of the side effects I experienced.
I would suggest to give it a little time but if anything really weird happens call your doctor!