Luce<3,Hello and welcome to HealingWell. I am sorry to read of your fear and you are so young to have to deal with such a big issue. First of all talk with your Mom and get an appointment set up. I think the most important thing is to relax and keep an open mind. You don't have to plan out what you'll say to the therapist - he/she is a professional, and will know what to do.
The more open and honest you can be with your therapist (and yourself), the more you will get out of therapy.
When you first go in to see a therapist, they have an intake that they need to completed about your background and why you are coming in to see them. So, there will be a good amount of questions coming from the therapist's end. If you have questions, that would be fine to ask them, and it's a good sign that you are participating in the conversation. You'll probably be able to get a good idea of whether or not the therapist is a good fit for you based on the feel of it rather than the answers to whatever questions you might have.
Nearly the whole first session will be "intake" of information and your therapist identifying how he/she can help you best. Don't be disappointed re the "intake" session as by session 2 you will starting getting into the issues that you want to work on.
Remember the therapist works for you and everything you say in your sessions is confidential.
Be brave and take that first step toward healing by finding a therapist with the help of Mom or perhaps your school counselor.
Kindly,
Kitt