Wicked - we live parallel lives 
dh is self employed too. He (luckily) was already off on the day she was born (at 2.15am) so did the school run that day (which was a friday), and then took the saturday off too, when he managed to juggle some stuff around, but went back to work on the sunday, and it was back to reality for me on the monday morning, although he was planning to be in to do the school run, a cow needed a caeserean
and we were up, and fine so we did it.
days are manic - today for example, take ds1 to the bus stop for 7.30 am, then make sure dd1 and ds2 have everything, (lunches pe kits etc, have a shower, and feed baby, breakfast ds3 and dd1, then do school run for them.
finished off OU assignment and sent ten mins before the cut off deadline!
went and mucked out ponies,
picked up little 2, took dd2 to dancing class,
popped to the supermarket, and picked up ds1 from the bus stop!
still have dinner, bath time and reading books to do!!!
and same as you Lucinda usually wakes up twice in the night.......
but I wouldn't swap it..... just wish there was 2 of me so I could get some sleep!!!