OP, I have no one to take care of my very demanding (autistic) toddler twins when I’m sick and never have - DH has only been able to take a day off once or twice when I’m physically unable to move, vomiting constantly etc.
I’m really sick right now - I suspect either flu or glandular fever (temp over 39, sleep throat that’s spreading up into my mouth, pain all over, feeling nauseous, can’t swallow) which has very irritatingly clashed with a screen ban we are trialling so I’ve been trying to entertain them all morning when all I want to do is curl up in bed until I feel better.
I’m not saying this to make you feel bad - I want you to know that If my mum were alive I would have no hesitation in asking her to look after them when I’m sick, if she was on board with this.
When my boys were 9 weeks old they got very sick with a bug, they were preemies and very small - DT2 ended up in HDU for nearly two weeks, and he’d only been home from NICU for 10 days. If I’d been able to prevent them from getting sick if it all possible I would definitely have done it!
Having a small baby is hard enough when you’re well - if you have the help take it! DT2 was separated from us for much of his first two months while in NICU (we were there as much as we could be obviously but weren’t there overnight etc) and it hasn’t stopped him from bonding with us.
Get some rest!