It must be difficult to carry around so much anxiety, fear, and to feel you have no control over it. Losing sleep on top of it just adds to the difficulty. I have three recommendations. First, stop watching horror movies and limit your viewing of TV news. The graphic images used in these mediums have been known to exacerbate fears and anxieties.
Secondly, I would put together a regular exercise program for yourself. Find out from your gym or health teacher what the best way is to begin. Regular exercise is central to any program that supports well-being.
Finally, if these two things don’t help enough ask to speak to your school’s counselor. He or she can help you figure out what to do next.