Topamax and pain in the butt

Hi...I've been on Topamax since October of last year. I take 50mg. in the morning and again at night. I haven't noticed any real significant decrease in the migraine frequency, just in the duration. Whereas sometimes I'd be in bed for an entire day, sometimes 2, now they only last until the early afternoon. A big plus. However, there are some side effects that I just can't live with. The dry mouth is a pain in the butt but that I can deal with. What I can't deal with is the almost complete loss of my short term memory. It's so bad that I will ask a person the same question numerous times in a 5 minute time period and have absolutely NO recollection of having asked the question previously. I have found myself walking down the street and not known where I am. I dial the telephone and not remember who is going to pick up on the other end. And I'm dazed and confused on a good day. On a bad day it's worse. I can't live like this. So...I was wondering if others had the same awful symptom that I'm experiencing. I have others that bother me but that one is the worst. Also, how do I wean myself off of this medication? Thanks for listening.....D.