thanks midgetm and springersmum for metanium tip. Bought some yesterday and think it's starting to calm already.
smorgs Yes, tricky in loos with a pushchair. Disabled loos easiest if available and using a sling leaves your hands free. But fine to leave baby strapped in pushchair outside the cubicle. How you'd manage in one of those French squat toilets, I have no idea...
DH is nobberish about child care. Thanks for sympathy. To his credit, he's dropping DD off at preschool five mornings a week when not abroad etc. but it is hard to rebut the 'you were the one who really wanted children' line, and it makes me very sad as he dotes on DD, even if he lacks imagination when it comes to entertaining her. 
On the baby-rage topic, I'm ashamed of the times I've cracked with DD - standing over her cot as she screamed in the middle of the night yelling WHY ARE YOU DOING THIS TO ME YOU ***, dressing her quite roughly because I wanted to punish her... There's a point when you're half-asleep that's quite dangerous - sleep deprivation is literally a form of torture, and so is constant loud noise. That's why I'm co-sleeping, really, as well as a certain commitment to attachment parenting. When he feels so small and vulnerable and close it's harder to be furious with him.
This may not work for anyone else, but DS likes to lie face down on my tummy and chest while I stroke his back with continuous downward strokes, two-handed. It tends to calm him fairly quickly.
Is anyone else longing for a holiday? I know flying would be awful and anyway DS hasn't got a passport yet, but I long to be swimming off a Greek island while they play in the sand...