mythree oh god yes - gaspy is EXACTLY the kind of nausea I get at dinnertime! Sort of have to pant my way through a handful of veg and a bite or two of protein, like I'm about to puke!
As for drinking, last night we had a wine reception, I took a glass, kept 'sipping' it (didn't actually drink any), put it down and picked up a water instead and no one looked! As long as you pick up a wine really obviously ('oooooh, lovely, a big glass of white! Just what I need'), I don't think they'll twig.
enormouse maternity wear is shit. Mothercare don't seem to go beyond an E cup in most of their maternity bras - FFS, I was DD before we even got going on the Giant Growing Breasts of Pregnancy Tale. I can imagine it's as shit at the slim/shorter end of the scale as it is at the fatter/taller end (me!) - apparently only 5'5" size 12s get pg.
mrsV like Pod said - if there is a hb, you are at the point you were at last time, but all is well (today at least - not being morbid, but I can understand you might be feeling a bit disbelieving). Take heart from that - if you get to tomorrow, you'll have got past that point, and the hb will be very likely still there. I'd def lobby hard for another scan though! 5 weeks is a HELL of a long wait if you have serious worries/doubts.
extra the NT must be done by 13+6, or the translucency is gone, and no chance to have an early, non-intrusive look:
NT testing HTH.