I was wondering if high doses of Lamictal can cause seizures. I a...

I was wondering if high doses of Lamictal can cause seizures. I am prescribed 200 mg 2x daily. I accidentally took 800 mg for a few days after switching from 2 100 mg tabs 2x daily. What followed was miserable. I had this weird vision-thing like a microfiche on its side, running very fast. I got dizzy, then had trouble walking. By the time I got to the hospital, I was having severe tremors, and the (dumb) hospital did not give Ativan for 45 min.after this started. The doctor said it could not be a seizure, because I was slightly aware at times, and could answer questions. I can't remember almost all of it, nor about 24-48 hours after. They had to administer 10 mg of Valium in the ambulance on the way to a separate hospital. The thing lasted for over an hour, I guess, and my husband (who has seizures from childhood also) says it was terrible- full generalized seizure. What ticks me off is that later they called it an anxiety attack, without knowing about the Lamictal doses. Has anyone ever heard of something like this?