Hang in there hun. It does get better. I've been in that deep black hole you are experiencing, far too many times. Maybe not quite as far down but I've been close.

Don't let the illness "win". Fight it. Fight for your life, for your happiness. You deserve to be happy.

Is there any way you can escape? Even for just a little while? Just take a break from your parents, from your life, and collect yourself for a while. I'm not sure how or where but that might be helpful.

Sorry that you have so much to deal with.