I have been taking Celexa for 6 years now & have went from 140 lb...

I have been taking Celexa for 6 years now & have went from 140 lbs when I started to over 250 lbs. I fell tired all the time & ...sleep ...what is that..? So as of this week I spoke to a new Doctor who is weaning me off of Celexa to switch to Wellbutrin...Celexa worked as far as keeping me from being so depressed most of the time but , as the years have went by it just dosent seem to be working for me any longer..I started out on 10 mg a day then to 20 mg finally to where I have been for several years now 40 mg. I have suffered huge migrains ,stomach pains , loss of sex drive , & upper respatory infection , mood swings....The up side to Celexa for me was that it helped me get through my day. Now that I am slowly stopping Celexa I feel plain aweful ,aggravation is a huge side effect for me I'm dizzy & feel like im in a fog . I sure hope the wellbutrin is worth changing for ..because I feel aweful...I have several concerns about wellbutrin ...mostly the seizers...I hope that this new med will work for me because the weight gain from Celexa over the years has cause all new problems for me now.