A bit belated, but I'm a big Firefly fan too, Moomin! Not going for the name River, then? 
In fact (shh) I'm very much a geek. A sci-fi loving, board gaming, roleplaying, console playing, manga reading geek. I have now lost all street cred, haven't I?
Still battling MS here. It's definitely starting to ease though, as is the exhaustion. This time last week, contemplating anything other than collapsing on the sofa was impossible. Now I'm at least able to do a few simple things around the house.
Probably just as well, given that we're in charge of DNephew tomorrow! A good practice run for having two children.
Assuming the MS keeps improving, I may end up back at the doctors next week to get a Fit to Work note so I can return sooner! [glutton for punishment]
Loving all the name suggestions. :) Currently the front runners here are Caspian (Cas) Mark for a boy and either Penelope (Penny) Rose or Josephine (Josie) Rose for a girl. We have a long pretentious surname, so the overall combination makes us sound much posher than we are. 
I wouldn't worry, Snoozy. If sweets is all you can manage right now, then eat sweets. Hopefully in a month or two you'll find you can tolerate other things and repair the damage to your diet.
It won't harm the baby, your body will give your baby all the nutrients it needs first and just rob you of them, so you'll notice you're low on iron/vitamins/etc long before baby has any problems. And it'll lay any excess fat on your own hips out of choice. (Nice, eh?)
Last time I gained a ton of weight in the first trimester for a similar reason (I could only stomach cake
) but then had a much slower gain later on. DD wasn't particularly big (8lbs 3oz). I still tore though; If you're going to tear there's not much you can do about it! On the plus side, I didn't notice I'd torn until they stitched me back up afterwards. :)