I'm so sorry hun. I can't imagine how that must feel. Your focus needs to be foremost on your own survival. I won't be one to presume I know what you need to do to accomplish that. I do very much know how it feels to have two choices laid out before you and being unable to imagine either leading to happiness, and I know firsthand where losing hope takes you. In my case, even though I didn't see a path to happiness, in reality there was one there and luckily I did take it. I only did so because I knew exactly where the other choice would take me, so why not? For you, the choices may or may not be the same, I don't know.
I will say only this, if it comes down to transition or death for you, as it did me, please don't choose death. Despite rarely agreeing with you on things, I've always thought you seemed like a really nice person and I couldn't stand it if you left this world prematurely. You will be in my thoughts.