Oh ickle how horrid. Its easy to say I know, but remember that dates based on LMP and DtD can be really inaccurate - and at 5+6 even a few days makes a big difference. I didn't think a yolk sac was visible till 5+5 anyway, so even a couple of days out could make a difference.
fedup hope the scan isn't bad news - keeping fingers crossed.
For both of you, if it is bad news, be kind to yourselves - just because you've found out earlier than last time doesn't make it easier, nor will you be "used to it" (which I was convinced would be the case). And have heart that there are lots of people on here who have had more than 1 MC in a row and have gone on to have successful pregnancies.
kat - glad to see you back. I feel your microwave meal pain ... our kitchen is still there but only a matter of days till it goes, and its now going to be mid Feb before its back 
I'm now 37 weeks and very uncomfortable, and suffering from chronic insomnia. Still got a week of work to go too, and they're being mean to me. Ok, they're not ACTUALLY being mean, but I'm definitely not getting any special treatment for being heavily pg and still having to slog my guts out to get all the work done. I think i'm wavering towards wanting the baby to arrive early and before Christmas, because I'm just so grumpy when pregnant! I will, however, be gutted if I'm in hospital on Christmas morning, because DC1 is sooooooooooooooo excited about Santa that I really really really don't want to miss stocking opening 