Jilimy - any chance the symptoms you could have been having were symptoms of ovulation or just something going around? At least at the next scan or so they should be able to put the issue to rest, dating scans early on are really quite accurate based on the lengt. I'm sure you're in 'twin shock' at the moment but congratulations!
Judybean - I am the same exact way. Doesn't help that our house is kept pretty cool, but I would have to turn the heat up significantly I think to 'feel' warmer. I've been wearing layers like I'm going outside, like tights under my pants and stuff. It's not all the time, but I go in spurts of being really cold at times.
Well I asked DH last night if I looked pregnant and he said, no I look 'thick' and like I'm just not my usual self, letting things go. LOL, I asked for it, eh? I saw my mom today and she suspiciously eyed my middle. My RE called when she was babysitting the other day, I *hope* RE didn't say anything, but who knows. I still am cautious to tell anyone, I don't know what I'm waiting for, but just don't want to deal with reactions, even though they'll be nothing but positive.