Thanks everyone for you all your advice and support. I've decided to aim to take the 2 weeks. One thing I forgot to mention is that my BP is up - 130-something/89, which didn't sound too awful at the time, but I've gone back and looked at my notes and the diastolic is normally 70-80 - so not good at all. (I'm apparently bucking the low-BP trend on this thread!) So I'm going to keep checking in with MW for BP checks, take up any offers of counselling I get, and see how things go. If I'm feeling OK, I might do some work from home next week - it would just be routine bread-and-butter stuff, which isn't the thing that's stressing me out at the moment, and would also make the biggest difference to my team.
Sorry that everyone is feeling so rough at the moment! 
Seriously - things sound very hectic for you, but very exciting. Your nesting instinct is obviously coming out in quite a unique and musical way!
Fanbelt - thanks for reporting on your GTT experience. I have mine next week. I don't do very well without breakfast at the best of times, so it's going to be interesting to see how I react. Might have to take a hamper with me for emergency picnic in the car park straight afterwards!
Warlin and Blondie - good luck with your house moves. I bet you're looking forward to being able to start getting stuff sorted out for LO's arrival.
TDW - you must be so looking forward to having your DH back again. I really hope the situation with paternity leave and longer term postings works out OK.
Right - as I'm off work, I'm going to go and watch Midsomer Murders with
and
. I'm putting the kettle on if anyone wants one while I'm up?...