Wombat,
It's been a while now since this thread started, how is the lamp post thing going?
When I was 7-11 years old I used to have a similar thing to you, I thought I had an invisible rope grafted to my back, and when I would go out with my friends I could walk through the streets and be fine- as long as my rope wasn't tangled up. For example if I swung round on a lamp post I would have to walk or swing back round to free myself of it, but it wasnt just lamp posts, i'd have to walk the same way home through the same doors etc til I got home. Nothing could cut the rope such as a door closing on it or anything it just meant there was always a tension there reminding me it's stuck. So I completely know where you're coming from, I never had the head jerks with it although I do get it with other things but the tension and the difficulty sounds very familiar.
But guess what? I'm completely free of it, i have freedom to walk anywhere I want to. I can get into a car one side and come out the other and happily watch it drive away, which before i would cry and run after it because my rope was being stretched away from me.
The change come not because of medical or therapy intervention but because of the way OCD and anxiety works (i'll have to write up a life story somewhere so people can come and see some of my experiences). So, how on earth did OCD get rid of this inhibiting feature of mine? Because OCD is adaptive, as it is also egodystonic, meaning it doesn't fit in with our ego/self perception. The best time for OCD to adapt is in our younger years up til where I would say early 20's as being naive, innocent and childly open is a key mix to making changes, that doesn't mean older people can't change it just means we're less able.
So while I was growing up, in the years leading upto secondary school alot of personality changes come and went but the main OCD and other comorbid conditions I have stayed the same. It took a while before I realised that I wasn't worrying about my rope because it had been replaced with something else, the OCD trait had adapted to my new state of mind and found a place to make something else inhibited. Some will say well where's the positive side in this? Well because yes it's bad it had inhibited me in some other way but it's not as bad as the rope was. Some how I managed to naturally influence this adaptation to be something less distressing.
The advice here is to use CBT, mindfulness, and other techniques doctors will teach you, to start changing our problems and be open about it.
Panic panic panic, if anything needs elaborating on then please message me as I have trouble converting thoughts into words
Ricardo.