Wino haven't got time to post as long a reply as I'd like, but I just wanted to say that everything you're feeling is completely normal and I certainly relate to everything you're saying.
I won't go for loads of stupid cliches and platitudes, we don't do that here, but I do want to say low motility is not the end of the world. You could still get pregnant naturally, after all it does only take one good swimmer, and if you don't IUI or IVF could be good options for you.
When you look at success rates it's easy to feel downhearted, but remember that simple numbers don't tell the whole story and each couples chances are different. Also, don't forget that for normal, healthy, fertile couples having sex at the right time only about 20% get pregnant each cycle, so IUI is not much less than that.
For now, though, I think it's best to enforce a Google ban until you're feeling better.
I think getting on with life and trying not to obsess is good, as is focusing on the good. Enjoy the things you have - relationship, work, friends - as much as you can. The feeling that you not only can't get pregnant, but are also not enjoying yourself, because you're restricting yourself so much in the quest to get pregnant, is awful.
That was quite long in the end, wasn't it. Sorry.
Oh and hello Sunshine. Welcome.