I've had OCD all my life, and what you're experiencing sounds very intense. Having to move twice is pretty major isn't it?
(I was thinking about this earlier) mine's all about control over my environment, not in a contamination way, but in a way that gives me a measure of order and control over the area I live in, like it's reflecting what's in my head (if that makes sense).
But when I was reading through your OP I wondered if it was possible for you to find a way to make a small area of the house, safe?
Is it OK for me to ask what exactly it is which is making you so distressed?
What do you normally do to alleviate the stress? Like rituals or whatever?
If you could make one part of it feel OKish, then you could gradually work on other little bits? (of course it depends on why the house isn't alright for you).
A lot of OCD is feeling that whatever you do to try and get rid of the anxiety (mine's counting/balancing things out) just never seems enough, or you haven't done it properly, making it difficult to allow yourself to be comfortable.
I've had my whole life to come to terms with how to live with it, but having it for two years is much worse IMO because you know what it's like to live without the fucker.
Cut yourself some slack, you're heavily pregnant with hormones all over the shop, that's enough for anyone, let alone with the added penalty of OCD 
Thankfully me and my OCD came as a package when I met DH, but I can imagine it is a bit of a bizarre thing to someone who hasn't encountered it before. It's concerning you don't feel fully supported by your DH though, in what way did he close down on you?