I lost 2.5 hours of my day today. woke up slumped over in drivers seat of my car. felt very confused and almost "roofied". could it be a seizure?

I would be hesitant: To try to guess. See your have had an eeg/mri/mra of brain ; are on lamictal. Are you being worked up for a seizure disorder or are you currently diagnosed with a seizure disorder? Are you currently being followed by a neurologist? This situation warrants a go through with a fine toothed comb- not a guess by a physician on the internet. Take care.