Topamax and pain issues

Who am I? Where am I? Ok its not that bad...but seriously, I have been on this drug for four weeks. My best description is feeling like im in slow motion. I used to be quick witted, with fair intelligence, seems like I am senile. I am taking this drug for chronic back pain issues. I have had pain for over a year, almost everyday. I was at a point of desperation, Im not sure now if its all worth it. I experience blurred vision a lot, I still get random pains/aches in certain places, I have noticed a strong ammonia smell with urination, last night I had serious heart palpitations. My pain level is decreased, and that feels great, I just dont think I want to feel like this. I cant even remember if I took my dosage this morning!