I'm so sorry you are under that kind of stress and pressure, both of stifling invisibility and dysphoria. Is there a youth group around you locally that you can come out to first, who will be a more assuredly supportive environment? If you are unsure or too scared of what your family's reactions may be, then it might be a good place to get on your feet from. I haven't come out to my family, besides my husband, and I'm starting to meet people my age as my preferred name and coming out directly with my gender identity, and it has done wonders for me dealing with home life, where I haven't come out yet.
Or do you have a therapist you can trust? =/
Try to stay strong, and I hope you feel better soon, and comfortable enough to come out.