Can you tell me how to deal with anxiety - 16 year old female?

Talk to somebody: Her doctor can prescribe something for anxiety, but therapy can be a great help.

Talk to your parents: Tell them how you have been feeling and that you think you need some help. Let them know that you need their support and do not blame them for your anxiety. You can also speak to a school guidance counselor or psychologist. They will help you speak to your parents.