Anxiety is getting me into trouble at school i need help please?

Start on an anti-depressant. I know it's probably not what you'd like to hear but it's shown to be the most effective way to treat anxiety related disorders. Ask your doctor. I've been on an anti-depressant for 6 months now and I hardly get stressed or anxious at all anymore. Side-effects of sleepiness may occur within the first few weeks of treatment but it gets better and it won't affect your ability to concentrate :)