M.O.
Oh, I'm so sorry she (and you) are going through this. What a terribly stressful time.
Really, I suspect she just needs to get on meds, and as others have said, those meds need some time to kick in.
In terms of volleyball/sports, I have heard of teenagers with cutting issues who successfully channeled their need to cut into sports/exercise. I want to recommend this cautiously, because these kids can literally run themselves ragged trying to blunt the emotional pain. But it seems like a sport/exercise, IN CONJUNCTION with therapy and meds, could be a good thing for her.