What is going on!?

The bell rings and i hastily round up my books. As i quickly, yet unnoticably make my way out the door my phone rings. It says anonymous caller. I hesitate to answer. The caller leaves a message in a low distorted voice saying "I CAN SEE YOU. YOU BETTER WATCH YOUR BACK". Then i turn around and there is still some people rushing out the doors to catch their bus.

A girl finds that her world is rapidly changing at a rapid pace. She doesn't even know where she stands, but tries to make it all make sense.
A paranormal story just a random idea i had i think its creepy but off to a weird start