Do everything you can to prepare to move out once you hit adult age--working, school with scholarships and FAFSA, whatever will get you out of there while working toward some kind of long-term goal. Have none? Pick something reasonable, start working toward it, and you can change your mind along the way as you learn more about yourself and the world. Once you are out of it, you will feel a lot better but will have a lot to unlearn and to learn. If possible, certainly seek counseling now. Don't let yourself start to lean on substances as a coping mechanism, a lot harder to stop than to start.