Mental Blackouts

My 43 year old daughter has been diagnosed with epilepsy with a hemiangioma on her left temporal lobe.  She has had petitmal seizures for the past 10 years, she chalked them up to high strees.  In Oct '07 she had a grand mal seizure, was prescribed Tegratol but did not take the medicine.  In Dec '07 she has a second grand mal seizure and began her meds which have been increased from time to time.  She has had petit mal seizures through the med increases, but has become increasingly stablized.  This morning she had a mental blackout - fixed breakfast without remembering fixing it and "woke up" at the breakfast table eating her cereal and milk with her fingers!  She found her spoon on the kitchen counter and was surprised to see it there.  What is this scary blackout telling her/us?