That therapist sounds like quite a twat, tbh. You were in a vulnerable position, and they should have never suggested that exercise. I know it's hard and you want to avoid nonsense, but if you feel worse after exercises like that, try not to let them talk you into it. It seems a bit self-serving of the therapist. "Look, I'm making progress, they hugged!" What I'm trying to say, is therapists can be clueless and pieces of turd too. Some can be very clinical, and obviously only seem to have been able to study but can't apply what they learned, or lack the life experience to relate.

Are there any family members you can count on?

Your mum is possibly (I say because I'm not a mind reader) feeling guilty, so on the defence. Doesn't make it anyone else's fault! Your mum, and grandpa are guilty. As well as your therapist for not keeping you safe.

I thought CAMHS was bad... shite!

Hope the slang makes sense, Australian here. Used to be hip wit it.