Thank you, lovely ladies. It's funny, I'm absolutely fine about rootling through stuff for my niece: we're really close and although she's only young, she's had her own journey of heartbreak on the way to having this much wanted baby. I'm almost finding it healing to think that she'll get some use out of stuff we might not.
But. A friend told me, today, that they are expecting number 5. I don't think it was planned - she was happy, but seemed a bit shell-shocked. She's a fairly new friend and doesn't know about our fertility issues - certainly didn't know how raw things were for us today - she would have been mortified if she'd known. DH was with me when she told me. I said all the right things, chatted for a bit, got into the house and DH just pulled me into a hug and said "well done, that must have been hard". I just sobbed and sobbed. 5 ffs.
We exchanged emails with our clinic today about next steps. They're going to get back to us, but the initial thought was that maybe my body needed a new "shock" to be successful - not quite sure what that was about - a bit lost in translation, but in the past, they have done a hysteroscopy and "chopped" into my uterus with things that looked like crocodile clips!
Lil - yes, we got pictures, on a memory stick. I won't keep them if none of the FETs work out. They gave me a print-out of the embryos after transfer though - they look like tiny stars. Apparently it's a bubble of air that you can see - they transfer them in a bubble so that they can see that they're in the uterus, but it's rather lovely. I'll keep that, even though this one didn't work out. I know what you mean about keeping stuff though - I kept my bfp from DS it was a medical strip one, so I just glued it into my diary. And my last pregnancy - that ended in mc - we called that one "barnacle" because (s)he was conceived when we were on holiday in Cornwall and I'd had several chemical pregnancies. "Barnacle" was in the hope that (s)he would cling on - and (s)he did, for a bit. Anyway, I have a little bag with the tests in it from then, with a poem that I wrote about the loss. Sorry to hear you didn't get any frosties - and fingers crossed for the little beans on board 
Thank you, Banana - yes, DH is being amazing. That's one of the big positives that I will take away from the IVF experience: it has really brought us together. We're much kinder and gentler to each other than we were before - the years of unexplained infertility and the stress of it all had made us tetchy and snipey. Making the decision together - and all the decisions and steps since - made us talk and grow close again and in many ways, fall back in love. Good luck - sounds like everything is moving in the right direction for you 
How are you doing, Osirus? Hope all's well.