Have you ever felt like you were being watched? Even when you're all alone...

I've only told two people about this but... I've been feeling empty for the past two weeks... I've been having strange dreams a lot too... if wake up vaguely remembering it... one dream I was in a fire... but I wasn't burning and I kept hearing voices in my head saying things that I couldn't make out... and I'd start blacking out, staring off into space, and and hearing faint noises in school...

Does anyone know what could be happening to me? I dunno what to do...