Brain lesion symptoms and conditions

I recently was given 200mg over the recommended pharmaceutical dose of Lamictal. My dr.'s partner prescribed this after a trip to the ER for a seizure to get me by until I could see my regular neurologist at the beg. of the week. The extra dose caused major blurred vision side effects, inability to walk, extreme sensitivity to light, and nausea. I am now at 400mg of Lamictal and starting Topomax with it so I hope this works. Any thoughts from anyone else taking this med combo?