I am sorry about your problems. If I could help you, I would. I really feel for self-injurers out there. You know why? Because I get them. Because I am one, too.
I hate it that other people....doctors and such think they understand you when they've never even felt the release it gives and so on.
My bad, I'm venting...
Anyway, about your wrists: DON'T DO IT! At least, try not to...
Thinking of you,