I know it’s been some time since you asked your question, but I wondered if part of, uh, “my story” might help you keep focused on letting everything out, so to speak.
I was in a clinic some years back, and yes, we were advised to write. Not only that, though: we had music therapy, art therapy, sport therapy… everything you can think of that makes humans uncomfortable when they’re not used to it.
Apart from therapists using this method to help you focus on your feelings and things you need to work on? When I was in the deepest depression, I created a character that reflected my darkest thoughts and feelings. I was filled with anger, with hurt, fear of rejection, paranoia (“everyone has it in for me” etc.)… It was nasty. All these feelings? I didn’t have an outlet for them, but writing that character created one!
And guess what: even after all these years—said character is about 7 now, I think—I have never had quite so many epiphanies about myself again. He was my direct mirror in a way, everything I didn’t want to be anymore. And to this day, he is a character that I still love, whose story I still want to tell, to show him the way out of his own dark hole. He never quite let me go. (Working on his story constantly right now, in fact. xD)
So… even if it’s “just” an outlet now. Even if it’s “just” to find another voice within yourself to get better, to understand yourself better… Perhaps that story can be more some day. And even if it won’t be? Then you will have something to look back on with fondness one day.
I wish you all the strength you need on your way. You can do it.