What are "sharp discharges" on an EEG?

I have been having seizures. Not to sound ignorant, but until recently I didn't see the big deal about it. I've had them on and off for years. I've drove and everything. But I stopped driving months ago when I had a black out moment and came to after I had walked into the highway. Luckily it was in the middle of the night, in a small town and no one was around. But it scared me. I was diagnosed with fibromyalgia and during that visit the doctor (new to me) asked me "Do you now or have you ever had seizures?" I was all "Well, yea." And she looked shocked since it's not in my records here. So I was told if I don't drive, they won't report me to the DMV (that way my son who has a learners permit can practice driving). I was grateful for that. 

I was sent for an EEG and to a neurologist. The Neuro doc listened to the carefully documented (by my son) seizure moments and I am sure I had a partial one in the office. Anyway, she said that the EEG showed "sharp discharges" on the temple area. I asked if it was the left side and she said yes... then asked why. Because when I have those moments before the seizures, the left side of my head "hurts". It's not OWIE hurts, it's a warm, fuzzy, zapping feeling. My friend said that's an aura.

Anyway, so I am on keppra (not sure if I like it) and I tried researching "sharp discharges" for EEG but I am running into a wall. What does that mean? And any other advice would be lovely.