Slow Brain waves on EEG

Hi, I have had seizures of some sort since I was a few months old. It was never very frequent, maybe once or twice a year. I remember as a child when this would happen, people would always ask If I had epilepsy. My parents figured this wasnt anything to worry about, so I was never tested. The past few years, it became more common. I went to the dr to get checked. I was referred to a neurologist, and did n EEG and a sleep deprived EEG. I went in for the results yesterday and he told me that I had abnormal slow brain waves on the left side of my brain and prescribed me Tegretol. He told me that hopefully with this medication I will not ever have another seizure again. My question is, is this epilepsy I have or what is it classified as? Thanks in advance.