is this nystagmus? pIease help?!?

I'm 15 right now (guy) and about 2 years ago, I got sick with strep throat and while I was laying in bed, I suddenly got a strange dizzy feeling. I found out it was vertigo and at the same time, my eyes were shifting left and right pretty fast and I couldnt stop it. It lastd about 5 minutes and it went away and until this day. I get the same feeling about once every 2 months. So I went to do an eeg and they found no seizures or anything. So that's good.. but nothing showed up for the eyes. The doctors I was talking with said its not a seizure and so I mentioned nystagmus but they said it can't be because it would be much more often than how often I would get it. So what is it? Could it be nystagmus? Please help?! By the way I am completely aware when its happening I can talk I, I can move and walk but if I walk I would fall over from the vertigo.. I would get panic attacks when it happens so I know I'm awake. Thanks.