Hi - this is my first post

I was looking around to find some support because I don't know who else to discuss this with, without ending back in hospital. Anyway, I have a history of escalating serious self-injury which, on my last attempt, required plastic surgery. I have also suffered from severe depression. I haven't done SI for a couple of months now, and although I am feeling better than i have in the past, I really, really want to SI. I don't understand where this is coming from and I know that if I do, it would be a big worry medically. I am fantasizing about it... I know it's sick, but what do I do? I have learnt many strategies to stop, but they are not enough. My psychologist raised her eyebrows when I told her and simply said, "In your case that would not be a good idea", but I am tormented by it. I won't be seeing a psychiatrist for another 4 weeks as I am a new patient of his and he has been on leave etc. Please help! I was forced into hospital before, but I really just want support and to talk about it. Can someone please help? I can't find any decent self-help articles, that would help me to understand this beast. Thanks for listening!