Double layers symptoms and conditions

I have been on the med for 4 yrs now (I think). 300 mg/day. At times, especially during the winter I get cold hands & feet where they become numb (& tingly from med. I assume). Fingers may turn white. I have thin skin in those areas (can see veins, redness). I wear double layers of clothes during winter/some spring & I live in Missouri (during the day, sleep). Still have tingling some in toes & fingers, ringing in the ears, memory & word loss, little stuttering/thought process before speaking, dry mouth. Fatigue - but I am a busy person. Stomach issues - constipation (but I also don't eat very well). Anxiety - Welbution generic the whole time I have been on this. Weight loss has been nice. After reading a lot of your comments I am wondering if it is time to get off of the medicine & see how I feel

I've been on Topamax for 3 years for migraine and it works most of the time. I am currently having a hard time with the usual side effects of memory loss, hair loss, word recall problems, coldness, depression, no sex drive, and am developing a cough. BUT I had a side effect that has not been mentioned when I first started taking it (25 mg in am and pm -- I'm now on 50mg in am and pm).
For about 2 weeks, I would get in my car to go to work and miss my turns because they would cognitively come up too soon (this is after 15 years of going to work the same way everyday). I had to be extremely conscious of my surroundings when I drove or I'd miss all my normal turns. I got lost in my own neighborhood once going home. At work, I'd get up from my desk to go to a co-worker's desk and arrive there amazing fast to my mind. I was experiencing time/space/distance distortion. It became fascinating to me, but it passed.