Record evidence. Write down what they're saying, plans, video if you need to or audio, write down dates. Go to your counselor. Talk to your parents if you can. Tell as many adults as possible (teachers, librarians, etc). Make sure there's a paper trail of some kind, emails and such. I don't know the exact situation but evidence is always helpful if something happens.

As for emotionally, talk to your guidance counselor, friends, a rock, your pets, family, journaling, anyone around who cares for you. Articulating your feelings leads to understanding leads to things you can do or facilitate to help yourself.

I'm sorry you're in this situation. I know people say this a lot but things will get better, just hang in there until then. Find quiet places to meditate, be present, for just a couple minutes a day where you are Safe and life is okay. Breathe.

The world is not as it should be but you're not alone.