Patricia
About 3 years ago, I had something similar happen to me. I had 7 seizures in one day - actually in about a 10 hour period. It was pretty scary. I could hear what was going on around me but I could not respond to anyone. They lasted about 30 seconds and all the symptoms were on my left side.
I had 2 in the car, 2 in the ambulance, and 3 in the ER. They did a CT scan, an MRI, EKG, and an EEG. Found nothing.

Loaded me up on Dilantin and made me stay on the dopey drug for a month. I think I was sleeping about 18 hours a day on that darn drug. I finally told my doc no more of this stuff, I am coming off it.
We weened me off the dilantin and upped my Topamax to 500mg a day - it's also an anti-seizure drug.
I've never had another seizure, nor had I had one prior to that day.
We all choked it up to stress and the beginning of a very bad exacerbation.
I have since backed down on the Topamax to 400 mg. No problems.