gp, I've been reading your thread from the outset and only haven't posted out of inadequacy.
I had dreadful OCD as a child - what you said about the saying words backwards and forwards was one of my worst symptoms, I was pretty much mute at one stage for 10 months as I couldn't get past the 'alphabet' in my head (which I also 'played out' on my fingers) in order to speak aloud. There were many other manifestations some of which included food and I got quite thin at one point.
Now I'm definitely under control but definitely still have OCD. It very rarely prevents me from doing anything - I got a BA, MA and PhD in fine art, if anything occasionally the OCD helped me to focus. When you can focus that kind of intent consciousness into something productive it can be quite amazing, it's only when it fixes on pointless intricate activities that it becomes like a sickness.
Now, I have only one dd, she's 5 1/2 and I am sure she's already showing OCD signs although I'm trying hard to talk myself out of the possibility. So far it's things like 'taking photos' by blinking her eyes to get rid of 'bad images' in her head. Sometimes it's like walking round next to a nodding dog she's taking so many photos. And I've noticed it increasingly with her reading that she does these weird swallows and clicks before she can say the words out loud. She's been 'perfectionist' since she was about 2 and become hysterical over things like the seam of her tights being 'wrong' i.e not matching the other foot.
Could you tell me, then, when your dd's OCD started? How long has it been as bad as it is at this point? I can't remember the facts of my own experience well enough and I'd like to think ahead for dd. Just in case.
Sorry for going on. Feel free to totally ignore this as nothing I'm saying is any help to you and you do need help and support at the moment.