Talk to someone about it
The important thing to remember is you are not alone. There are plenty of things you can do and people you can talk to who can help. Often just talking to someone can help release the pent up pressure you might be feeling.
Talk to your family or if you don't feel comfortable talking to them, try having a chat with a teacher or even a friend.
Another idea is to look for local support groups where you can share your experiences and learn from other people.
People are often a lot more understanding than you may think and most people will be pleased to help.