Abnormal EEG, What now?

Hi ! My neurologist made an appointment for me to get an EEG. Because of somethings i dont know. Like I've had migraines for about 9 months. Then i started getting what i thought was vertigo. And then she asked if i had any sleep disturbances and i said sometmes my legs twitch like they are restess, and i wake up. Well anyways im getting off topic. So the EEG people called my mom saying i had an abnormal EEG. (during the EEG i felt super weird and like my eyes were twitching during the really high strobing lights) So what does that mean. I have a neurologist appointment coming up . what is going to happen there? More testing? Or just explain whats abnormal? I'm only 13. :) Thanks!