Kim,
So sorry you're going through all of this. I had a 'grand mal' pretty much out of nowhere at the age of 42. I didn't know it until after the fact, though, that I had non-febrile seizures as an infant (5mos. old) and was on phenobarb. until 2 yrs. old. Never took meds again and never had a problem until 42 years old--but like you said, you were stressed out and hadn't slept...that can awaken seizures, unfortunately!
I had insomnia and stress from my job when my grand mal hit, and the eeg showed abnormalities. Maybe in your case you'll never have another seizure--that truly does happen! Some people just have one "biggie" and it never happens again. You just have to make sure you get lots of rest, exercise and work on reducing stress, if possible. There are very few states that require you to relinquish your driver's license after having a 'grand mal' seizure, actually. But honestly, you don't want to drive until you're seizure-free for six months before you drive again, as you DID have a whopper of a seizure.
After mine, I don't know if it was the meds (Dilantin and Lamictal) or the seizure itself, but I really didn't feel normal, whatever that is, until almost a week after my grand mal. But I'm a Copywriter by trade so you can understand how it was difficult for me to find the words needed to write for advertising after such an event!

Just take your time and do what you need to do to come to terms with what happened to you. Hopefully it was a one-time thing. Take care of yourself and REST as much as possible. And most importantly, find a good neurologist!
I wish you the best!