I'm so sorry that you're having such a rough time, ScaredKid.

Nausea and vomiting can be due to anxiety. I was like that through junior high and high school (about ages 13 to 17). Nightmares are also a symptom of anxiety. It can make you feel physically horrible even though medical tests show nothing wrong. Be comforted by knowing that medically you are alright. Anxiety can seem to come out of nowhere and make you feel overwhelmed, but it can be dealt with.

It would be a very good idea to ask your doctor or school counselor to help you find a therapist or psychologist to talk to so that you can get some real help and relief.

Here's one thing to try when you start feeling anxious or even just nauseous; breathe in for a count of four, hold that breath for a count of four, then breathe out for a count of four. Do that four times. It makes you focus on something logical (counting and breathing) instead of the panicked feelings.

Another one is to just look around you and start naming the things you see. You don't need to say them out loud. A bed, a chair, a door, a table, a book, a desk, etc. Whatever you see, with no value judgments. Or maybe a red chair, a white door, a little book, etc. This also makes you focus on logical things and takes you out of the anxiety.

A friend of mine was told to put a rubber band around her wrist (loose enough that it doesn't bother your circulation) then when she felt panicked she could snap it against her skin. This helped her to focus on something besides her panic.

You know those wheels that are for hamsters to run in? They just keep spinning and no matter how fast the hamster runs it just makes the wheel spin faster and never actually gets anywhere. Anxiety is like that. It just keeps spinning around and around in your mind and the more you struggle against it, the faster it seems to go. You need something that helps you step off the wheel. It might not go away immediately but it's no longer controlling you, at least for a while.

Try to avoid the horror movies. I know they can get stuck in your head but they are only feeding the anxiety and making it worse. Watch something completely different than what you might normally watch, like maybe a silly cartoon that you liked when you were little.

Your body can't tell the difference between a panic attack and a real, physical threat. You get scared and your body makes a whole bunch of adrenaline to help you fight or run away faster. Even if it's only anxiety, you still have that adrenaline and that makes you feel wired and jittery. It helps to do something physical to burn some of that adrenaline away and that will make you feel calmer. Jogging, swimming, riding a bike, or things like that. If there is a sport you like to play that might help too, but for me doing something by myself was easier because I didn't have the added anxiety of trying to hide how I was feeling from others.

Finding someone to talk to, like a counselor or therapist, can be really very helpful though.