Hello all. Thanks for your answers.
I'm not worried about routine at all, or being 'behind' in learning. Especially having just read my first John Holt book and being completely inspired by how children are motivated to learn all by themselves. It's just how I can manage if I'm really tired or have had no time to myself.
At the moment ds3 is 5 months old, ds2 is only doing half days at school and ds1 is full-time. I think I should point out that ds2 has epilepsy and, whether due to his medications or not, is also very hyperactive. Even a few hours with him is rather draining. That's probably the main reason I really need to know I'm going to get time to recharge and won't just have to keep on going indefinitely. And it limits the number of people I can ask to (or trust to) look after him without me around. But it's also one of the reasons why I think ds1 would benefit from spending more time with me instead of being at school.
Sometimes if I've had a busy night with ds2/ds3 I actually manage to get some sleep while ds3 is asleep and before I have to fetch ds2 from school. I also get a bit of a lie-in (in between feeds) on weekend mornings as the older boys are happy to just go on the computer or watch TV and dp is kind of keeping an eye on them.
I feel much better if I go to bed about 10pm but I can't guarantee that all boys will be asleep until about 9pm. And I never really know when dp will get back from work, and if he gets back when the boys are still awake he usually spends a bit of time with them but then goes to sleep in front of the tv . So after 9 is my time to do swift tidying up (I'm absolutely the opposite of houseproud) and other stuff like getting my sewing machine out, reading, watching TV (rarely) or going on the internet. Evenings often see me staying up until about midnight as this is really my only 'time to myself'.
And I don't get any time to go swimming, which is why I was looking forward to it after Christmas, before I started to think about ds1 and how it would be far better for him to be at home than at school.
Illness: I've been fine recently but when I was in my first trimester pg with ds3 I had a few days when I really couldn't even drag myself out of bed in the morning. On those days dp got the boys to school - but then went to work to leave me to sort out the rest of the day (including ds1's packed lunch which he had neglected to make ). I've never had to ask him to take time off work. And I am very jealous of anyone whose partner works part-time or who has family nearby as neither of these has ever applied to me. Mind you, dp's started to think about a better 'work-life balance' and working part-time so things might improve there at some point.
School holidays - when I was still working the boys were at a childminder a few days a week, so I carried that on in the holidays too. I stopped working two years ago and the first summer I was really worried about how I would cope. But it was great! The boys did a little theatre summer school one week and I also used a playscheme a few times. But at the end of the summer I felt that I could have had them with me for longer. That was before ds2 started having seizures though. This summer just gone was also quite different as I had various family members staying for a few weeks and then a post-natal doula because ds3 had only just been born.
I think my conclusion is that I'll have to give up on the idea of swimming during the day, for now at least, and talk about the rest with dp...