Grand Mal Seizures at 15

Hi, I had petiete mal seizures when I was a kid, but was declared seizure free when I was 11. A month and 8 days ago I fainted in the middle of a school presentation and woke up in the ambulance on the way to the ER, later finding out that I had fallen, smashed my head, and had a seizure. My doctors accredited it to dehydration and I was left unmedicated, but then 8 days ago I had another seizure in the middle of the day, when I was sitting down, and fully hydrated. Now I am back on medication. I just need the facts. Whats the chance I will grow out of these again, is there any possibility they were not actually my epilepsy returning, and what kind of life can I expect if worst comes to worst?