Gosh, I'm really sorry to hear about your troubles. It sounds like you have quite a few difficult obstacles in life, and I really empathize.
It's not exactly the same thing as you, but even though my body is healthy, I have many struggles with it, too. I was always naturally slim and kept my weight down very easily, and suddenly I gain weight so easily that I am pretty much just eating boring vegetables every day, and I can't eat very much at all. I used to love chocolate and cakes - forget pleasurable foods now. Weight gain would not be such a big deal, but even though I am technically still slim, my body feels swollen all the time, and incredibly uncomfortable. If I gain an ounce, I am dying of discomfort.
My body is so uncomfortable now from feeling swollen that I can't even do yoga anymore, which I used to really enjoy.
So I can empathize about not being able to do the exercises that you used to enjoy. Also about the food - food and enjoyable movement are out of the running for me. Two things that make life enjoyable, or at least more bearable. I'm still coming to terms with these losses. I am 31, so not that old. I can only imagine what my body would feel like if I lived to 40, and started gaining weight from hormones. I can barely cope as it is.
It all feels very unfair.
It sounds like your parents might be happy to help you out, and perhaps you can buy yourself some time with them if you don't feel ready to ctb. It wouldn't feel good to have to give up your car, I imagine. I'm so surprised that you aren't eligible for disability! Are you sure?? I'm on disability, and I live in the U.S., where the social safety net is a lot worse than it is in Denmark. And I 'only' have mental illness.