Hello!
I was on this thread earlier, but lost track of it as we got into the whirlwind of clinic stuff, and just catching up.
shoes, I am so sorry to hear your news, especially the update. It sounds so glib to say this - but it is rotten to be worrying about whether it could have been prevented. I am so sorry you're going through that.
stork, I just wanted to say, I have a lovely friend doing exactly what you are doing, and I am so excited for her as it is clear to me she will be a wonderful mother. I think it is a very positive thing to be doing. And studies do show that babies don't care what set-up they're born into - traditional couple, single mum, whatever - the things that make a difference are love and (less romantically!) financial stability. 
I know I am replying to old news, but your posts came up just below where I was before I stopped posting, so I saw them.
Anyway ... we've been for some early clinic visits, and I have embarrassed myself (and highly amused DP) by fainting when they took my blood. Though, goodness, why they need to test my blood when this baby won't be biologically related to me, I do not know! But they insisted.
We are finding it a little strange so far - apart from our first nurse, all the medics assume I'm the one who'll be carrying the baby, not DP, and it is disorienting. I'm also finding it a little odd in other ways. I had some miscarriages with my ex partner (one reason DP is carrying!), and I am finding it oddly upsetting that people - on MN, but also in the clinic - automatically respond as if this is the first pregnancy I've ever been involved in, even when we've said it's not. In fact I am not quite sure how to deal with that - it's DP's first attempt at TTC, and I want to be so excited for her, of course. But of course, as many here will understand, it's hard not to be aware of how uncertain it is.
Sorry, that's a right ramble! 
But I had to get it out somewhere, and I am glad to be back on here.