Hey everyone, thanks for your help.
I guess I was feeling pretty stressed out last night, and I figured someone would know what to do. Anyway, LR fell asleep not long after I wrote that, and when he woke up he was still a bit shaky, but his toys wanted to go for ice cream in our pyjamas and that's what we did (even though we did get stared at)! Ended up having a long conversation about what happened and then we had a cuddle when we got home, which I think has happened maybe twice before, if that.
He's watching TV right now with DH, so I figured I'd update you all and say thank you.
As for the therapist, I know the woman who owns their company (I know that's not the right word) vaguely, so I think I'm going to mention all of this to her. What she did was unacceptable, and you better bet there are going to be repercussions.
Thank you again.