Thanks guys. I got home not too long ago from what I'm calling ZT (zygote transfer). I had to get some petrol on the way home, and bought some chocolate too; normally I wouldn't do that but I think I bloody deserve it today! Except it'll probably make me feel even crappier once I've eaten it.
DH texted me to say he was boarding his plane right when I was lying there with catheters hanging out of me, so I thought of him as they injected "Timmy" (our joke name for our hypothetical child) into my uterus.
I'm trying not to lose hope completely. The chances of this emby progressing are IMO so very very slim, but I promised DH before I left home this morning that I would give "Timmy" pep talks everyday and convince it to keep growing.
On the positive side, this is the absolute closest I've ever been to being pg, so I guess that's something to "celebrate". Also, the rectal pessaries are actually incredibly easy to insert, I can't believe I was dreading them so much!