Girl-Interrupted, I know I'm just a random person on the internet but I just cried when I read your latest posts. I cried because I know what it's like to feel that bleak and I'm really sad to think that you're so sad.
Please ring the Samaritans on 116123. It's free from any phone.
I've read some of your other posts in the past and I remember you talking about how your parents aren't listening to the fact that you're depressed, they're not taking you seriously and they don't understand. I want to tell you something I wish I could tell my younger self, because she was all alone, just like you. My parents didn't listen either, they ignored me SI-ing and they went home and left me in hospital alone when I took an OD, and they never once gave me what I needed. It hurt, and it still hurts.
But you know what? It gets better. Even though it doesn't feel like it now, it will get better. Because you will get older, and braver, and you will have more control over your life. I remember how I felt when I was in that place where you are. I still go there sometimes. I wish I had reached out for help more, I wish I hadn't been alone with it. The fact you're seeing a mental health worker suggests you might have been to your GP - could you go back again? There's a whole bunch of numbers here as well:
Depression UK - links to helpful websites and information.
It can get better, even if it doesn't feel like it now. You have every right to feel this way, but I hope you can hold on, because it won't be like this forever.