Alux - thank you, thank you, thank you for such a kind post. God, it really sounds like you know where I'm coming from.
Interesting that you suggest going away to stay with a friend with children. I've already discussed going to stay with my oldest friend in Scotland for a few days (she's v keen and also incredibly helpful - she has 2 children herself) but DH said, "you can't run away every time the weather gets hot you know" .
I have also been offered a stay slightly closer to home, with an Internet friend I made on an online antenatal group (?!). She's lovely - but she has a baby herself of almost identical age, and because I feel I don't 'really' know her I haven't taken her up on the offer.
DH finishes work this Thursday (he's a teacher) and I think things are going to change once he's on holiday [evil grin emoticon here]. There is NO WAY I'm carrying on doing everything!!
He's already started doing a little more at night, since I brought the AD's home. I think that made him realise this is serious.
I'm not looking forward to Thursday itself, though, as he is going out with colleagues to celebrate the end of year and won't be home until late. I'm thinking of booking a babysitter so that I can go to bed while he's out... at least that way I'd have a fighting chance of coping with the night shift!
He took DD for an hour and a half (reluctantly) yesterday afternoon, while I went for coffee with a friend. I'd fed her just before handing her over to him. Within about half an hour he was texting me in a panic, and by the time I'd got home he was already feeding her (expressed milk). sigh Does he ever wonder how I get through the day, if he can't even manage a couple of hours?!
Well - he's going to learn!