New here, and I really need some help!

I don't know if I am having seizures or not. If I were to think of what a seizure would feel like, then what I experience seems like it would be it. I am 19, and have been having what I call my "brain shocks" for a while. I remember having them at 15-16, but I didn't pay attention to any time before then. What I am so confused about, is that I don't do the whole 'fall on the ground' or convulse, or do anything obvious. I know before I have a "brain shock", I feel a little lightheaded. Then a buzzing-you could call it-begins in my brain. Sometimes they are light, sometimes more severe, but I never lose consciousness. I feel my eyes move though, I don't know where, but they're going somewhere! :) Once, I had a severe one, and I stood there as it hit me. One of my friends was talking to me, and I held up my arm with my pointer finger up, telling her to wait. I just stared at the ground, I couldn't really move, or talk or anything. I could hear, but it was like I wasn't in control. Then it faded. I don't know if I am just having weird brain things, or what, but my grandma that used to be a nurse thinks I am having petit mal seizures or something, but I can't find anyone that knows what a seizure feels like when they are having it so that I could compare the feelings. Can anyone help me? Does this sound like any form of epilepsy-or am i just crazy? Thank you!