OMG! I Think I'm Going Nuts!

Hey all! Okay this may sound weird but.... I think I've been overshadowed by a ghost! Lol just joking... or am I?
Today, during Maths period, I was sitting beside Jessica. (Just to disturb her... XD) So, while I was disturbing (like always), I suddenly did a lot of crazy things to her like saying yucky stuffs and even writing the 'F' word on her book! Its the first time I did this! After that, I think I kept talking to myself and laughing uncontrollably... And last, I walked like a drunk person around and around the class. (Weird isn't it?)
If any of you guys know what's happening to me, PLEASE TELL ME...