I've had OCD from 3 YO when we moved house (or so I'm told), looking back in hindsight I think my granny had it too because we're very very similar people, so it's possibly genetic.
I've had trouble with it in the past, but now instead of fighting I've just accepted it as part of me and work around it best I can.
My 10 YO DD1 has done things for about 2/3 years that I've seen as OCD behaviour, not too bad at first, but it seems to be getting more pronounced recently.
I deliberately didn't discuss any of my rituals/bizarre looking behaviours with her so I didn't put them into her head, and also tried not to do any around her or get her to collude in them.
She does seem to do similar things though, which is a bit weird for me to see. Some unusual facial tics, counting, feeling lopsided and favouring one side of the body over the other, things like that.
A couple of years ago, because something came up at school, I reluctantly mentioned it to DDs teacher, only to have my fears confirmed that once you mention something like OCD to someone they get a stereotypical image of what it is and start labelling the person.
The first thing the teacher said was 'Oh, isn't that linked to autism?'
I know I'm not a medical professional either and I'm kind of labelling DD myself, but I feel it's different because I know what it feels like to be there, so to have a teacher making all kinds of links/assumptions about DD when all I've said is that she might possibly have OCD, makes me very nervous.
On the other hand though I've read somewhere that the earlier the medical intervention is, the better the DC is at keeping a lid on the symptoms of OCD when they're a teenager, and I also wonder whether I'd have had such a shit time of it if I'd had help when I was younger.
I would not be at all happy with any kind of chemical intervention for DD, but I have found cognitive behavioural therapy helpful in the past and wondered whether it'd be a good thing to seek out for DD.
So the crux of the matter is weighing up us/DD trying to manage her OCD alone and not making a big thing of it, or take her to the doctor and see if he can help, which carries the risk that there's no turning back from a diagnosis of OCD and DD being labelled as having mental health issues.
I just don't know.
Sorry it's got a bit long
I've been wanting to post it for ages but didn't know how to word it, not like me 
Thanks for reading, any advice/experiences/thoughts would be appreciated.