Hi Rosey, and welcome to Susan's!
I think you ought to try to get some help from a therapist who has experience with gender issues. To do that, though, you'll need the support of at least one parent. Don't just blurt it out, though, prepare yourself before telling them.
Go to our wiki
https://www.susans.org/wiki/Main_Page and print out some of the things there, like the AMA resolution #122 that supports the medical treatment of GID, and other information that your parent(s) can use to understand this. Have those things ready when you tell them. It may be better if you tell one parent at a time. Moms are often easier than dads with this kind of info, but you know them better than I. The go to the "Main Page"
https://www.susans.org/Medical/Therapists_and_Counselors/ to look at the links for therapists so you can hopefully find one that is nearby.
I hope you will find the support and help that you're looking for from your parents, Rosey. In any event, you come come here to talk and write and learn about what being trans is all about. Many of us have been through the same stuff you are dealing with now and maybe we'll be able to help. Above all, Rosey, make sure you remember that being trans is not something shameful or bad, no matter what some ignorant people may say. You are as good and deserving of dignity and respect as anyone.
hugs & smiles
Emelye
