As most of you know I also have body psychotherapy as my main issue is touch and my reactions to it. She rarely touches me without my permission but a couple of times when I really lost it in a session to have someone hold on to me and say no they wouldn't let me hurt myself as they cared too much was very powerful. To have another person saying they are with you and won't let go sounds slightly wrong written down but was so completely what I needed in the session. It was one of the very few times I actually felt she cares. I know with my mind she does but I rarely feel it.
I think like others have said as time has passed I have found I do it less and less. I still want to but these days rarely act on the urge. We have never talked about it much as she seemed confident dealing with other stuff would help the sh to decrease.
As for the shaking mine quite likes it as well as she often says it is letting something out. I generally fight it by tensing up and she encourages me to stop and if I can't at least recognise what I am doing.
Hang on in there. It is a horrible place to be but it does get better. I never thought it would and although things are still pretty rough I don't use half as many destructive behaviours as I used to.