You say you're a kid; are your parents not able to get you in to see a sleep specialist? Seeing a counselor might also be beneficial as there may be unresolved issues in your waking life that may be contributing to these dreams. Some counselors are willing to work for a reduced fee if a client has little money.

If neither of those options are open to you, I would possibly recommend visiting your school counselor who may be able to help and/or provide resources for you. I do also second the above recommendations of watching what you eat before bedtime as well as what you watch or read if you do those things before bed. While I don't experience night terrors, I do often dream about things I've seen or read just before bed.