What happened the first time around that made you feel better? Can you try to do that again? Or put yourself around things that remind you of that time?
I realise that you have really just switched cutting for bruising. I guess in some sense that bruising is less harmful???? But probably still bad.
Can you go back to the old psychologist/psychiatrist?
Can you "accidentally" show him a bruise and see whether he picks up on it? It might seem a less scary way that telling him outright??
I remember when my doctor first asked me, I was so scared, I couldn't talk. So I just showed, it seemed easier.
I'm sorry you feel out of control.