Hi Oneway,
You're not alone - in April my dd, aged 13, decided to have the upper hand and pushed me to the floor. Fortunately, I hit my head on a door as I fell, and not on a solid internal wall. I fractured my right tibia, tore the cartilidges on the inside edge of my knee, and sprained my knee. They didn't check the left knee at a+e, as, because I had banged my head I couldn't remember that I'd felt that one give way, too.
Cahms where we used to live in the UK were useless, the equivalent here aren't any better. We had police/fire brigade tearing round the village after she attacked her father with a felt pen after threatening to kill him, and it took 3 circuits for them to find the house. All he had done was to tell her not to call me a 'fucking bitch' and to f-off.
My dh is 62, and I'm 7 years younger. 2 years ago she spent 2 weeks in hospital due to very high levels of anxiety, and then several weeks later, she spent 6 weeks in temporary foster care to give us a break.
On a self-evaluation scale she is autistic, seems very likely to have PDA (pathological demand avoidance), and serious 'pervasive development disorders' but after 8-9 years of verbal and physical violence, the official verdict is that we're bad parents. PDA is unknown in France, where we live.
If we can get our gp to refer us to Nottingham, we could have her evaluated there - only problem is that is costs about ?3000, and we're not entitled to NHS treatment. We could always argue that Camhs should have carried out some evaluations, and that the PCT should pay for it, but as George Osborne is our MP, don't think that there's much chance.
Sorry, that this is rather negative, just feeling very very worn down at the moment, and without much hope. Probably 'cos I've been in pain most of the time for over 4 months.
Take care, have a hug and
or 
tb