Wellbutrin and sucicide

I've been on Wellbutrin for 8 years. After reading this forum I seriously question wether if I am the forgetful person that I've become. It's been so long since I've been clear-headed, but I know that as a child I had an extrodinary memory. Because this has viably been a side-effect that has existed for 8 years, I learned to believe that it was who I was. 2 years previous to starting Wellburtin failed in an sucicide attempt and thought that it could be from that. But because of overwhelming anxiety and hives,my doctor has upped my dose from 150mg to 300mg daily. Now I'm noticing that I can't remember chuncks of time. Trying to replaying an event in my mind and realize that I don't what happened after...and which roads I drove on to get home. It's a daily occurence. I will set everything out to take to school, but forget to grab the stuff. Laundry takes me days, because I constantly forget to change loads. I get distracted easily and don't know what I was doing or simply forget that I was doing something. 3 times while writing this I forgot what my next sentence was going to be. I always feel like I'm in a brain fog anymore. My greatest fear is that Wellburtin is the only one in it's class. I tried Paxil, Prozac, Effexor and had horrible side effect. So is it Wellbutrin or nothing? Does anyone know or have suggestions of other meds? When someone hurts me, I usually can't remember it long enough to mad ever again. I also have severe migranies, but not sure if thy're are related.