Gumps - lots of hugs your way. I'd go to the docs if it were me, at least they'll get checked out and the worry is lifted. With you on the lack of sleep. DS was awake from midnight until 3am last night screaming for most of it on and off. He wouldn't settle anywhere. Was expecting teeth to arrive but think it is 'just' separation anxiety. He finally slept velcroed to me in our bed, but if I so much as moved an inch away from him he wailed. He settled ok-ish tonight so am hoping we are not going to have a repeat performance.
MissJ - I would go for it. 4 weeks is not a long time really and he'll not remember in the long run. Plus it is at your DH's quiet time so would work out really well with childcare. You won't be away the whole time and I think you'd probably find N more settled at night if you weren't on hand so much - D virtually sleeps through if I'm away for the night, they seem to know how to play their Mummies.
Christening sounds lovely News, love the conker picture! Your girls are so beautiful and so alike.
Dashing off again - busy times. Am hoping things will settle soon.
On the job front, I am planning on going back 2 days a week in January, have applied for a couple of jobs but nothing I really really want yet. DD starts pre-school in Jan and is very clingy and not very confident. Am pretty worried about how it will go. DS is also booked to start nursery. If it were you would you put off work a month or so until they are settled or not? Am considering having 4-6 weeks at home before I start working, but feels a bit indulgent and a waste of their precious days. But then I'm worried if I'm working and DD doesn't settle that MIL will be picking her up and having her in afternoon and I'd like to think I'll be there for her.