Is there a cure for Lamictal induced exhaustion?

I've been on Lamictal on and off for three years to control epilepsy. When I was on it the first time, life was good and my seizures were controlled. I experienced little to no negative symptoms, and I was highly pleased with the meds. After I went off (after one year, doctors told me my EEG was normal) I didn't feel that much different. I had a seizure 6 months later, and got put back on Lamictal, and now the side effects are driving me nuts. I am exhausted ALL time time. I can't remember the last time when I said I was not tired. I get anywhere from 7 to 10 hours of sleep a night, and it's completely uninteruppted. I also feel dumber (if that makes sense). Reading is a lot harder, and sometimes I forget stupid things like how to subtract. Is this normal? Is there anything that I can do myself to make this better? Or should I suck it up and go to the doctor? If so, what other meds have the least amount of side effects?