If your children have certain temperaments, 6 weeks is a very long time when it’s looming over you. I’d suggest trying to break it down to think of a week at a time and maybe have a weekly routine, so every Monday you go to the library, say. Then when you’ve done the library in the first week, you can say “only 5 more library trips til we’re back in routine” 🤣 I’ve had phases where I’ve really struggled with my kids and had to almost take it hour by hour. When they were 6-7 and 2-3 was definitely the hardest phase so similar to yours. Mine also have additional needs so entertaining themselves was one battle but keeping themselves safe whilst alone was another entirely!
I definitely agree with a PP that trying to get your youngest into a few extra sessions at nursery seems a good idea. Having the kids 1:1 for short periods feels like a break when you usually have 2 at a time 🥴 Are any of your eldest’s clubs running any intensive courses? So he’d know the coaches/leaders already and feel a bit happier than the last time he tried it? My kids’ swimming lessons offer a week of intensive lessons which would give you 45 mins to take one child to the park while the other is entertained? It’s not much but it breaks up the long days.
Maybe try to break up the day into sections just for yourself to feel a bit more sane? If you can make it into 10 sections you can get yourself through the day by thinking, “right that’s another 10% closer to bedtime…” 🤣
If they aren’t really into tv, leaving a toy set up in the living room for them to come down to helps my kids. Like a few cups and saucers and a couple of teddies sat round a tea towel posing as a picnic blanket, nothing elaborate needed.
Pre-breakfast: Play with what you’ve left out or tv
Breakfast
Garden
Make fruit skewers for snack
Snack and screens
Meet friends at the park
Lunch
Lego/stories
Snack
Playdough
One or both ‘help’ make dinner (age 3 I’d just give mine a kiddy knife and the stalk of the broccoli or an old, softening carrot to chop - it doesn’t need to actually go into the dish 😂)
Then dinner, bath and bed
Not all crafts have to be majorly messy, but if you’re talking paints/slime/baking - do them in the garden! With a tablecloth if you’ve nice garden furniture. But it can all just be hosed down then. If you have to stay inside, mine love having a glue stick, some scissors and a magazine or toy catalogue to make pictures. They quite like sweeping the offcuts with a dustpan and brush after, too so minimal clean up for you.
I know it might seem harsh when your husband is unwell but if he’s ok to be alone then it might help if he were able to stay elsewhere for the day once or twice a week. A relative’s house who doesn’t work from home? Or instead of paying for camps could you pay for your husband to rest in a hotel instead so you can stay in the house with their toys but aren’t disturbing him. It’s lovely to be out and about but exhausting and you need some down time in the house too.
Mine are 10 and 5 now and it is easier. Still tough but at least I’m not battling naps and nappies anymore! 😰 In a couple of years it will feel different. I’m sure you’ll be fine, could just be the anticipation making you worry.
ETA: Can someone give you an evening a week off? A couple of hours to go swimming alone, or pop over on their lunch hour twice a week so you can read a book in the car with a cuppa for 20 mins even?! Otherwise it really is going to take it out of you. You need to make sure you get some kind of break.