I hear ya, OP. 38 weeks pregnant, had a couple of intense weeks with all the school/PTA Xmas stuff plus handing over my workload to a temp (lots of late nights of overtime)... And then I got struck down with a cold that I'd normally struggle on through but had me on the sofa in tears at one point. DH was watching the football and I could barely breathe through snot yet was standing in the kitchen making sandwiches for everyone's lunch.
On top of this, I'd recently had a chat with DH about the mental load, had shown him the comic strip (will find link), waited for the defensiveness that would follow - actually he took it on board and recognised the truth in it.
I asked him if taking the dry laundry off the line and folding it into the 4 neat little baskets I have for each person could become his job. Yes, I am particular about how it gets hung on the clothes horses, but not about how it is folded or how it makes its way to each persons bedroom. I mentioned this would mean he'd have to notice when it's dry, and do it promptly, as otherwise I wouldn't be able to get the next load on (washing machine goes on at the very least every other day).
It didn't happen. 3 weeks went by and then I finally snapped about something else and bought this up. He said he's been busy, he's doing his best, he comes home from work and gets straight stuck in with the kids. All true. But no different to what I'd been doing and I pointed that out. Laundry always needs to be done, there is never the perfect time to do it, it can't wait until the weekend, it has to fit in with whatever other thing I do when I get home from work etc etc.
We both ended up in tears and angry at one another.
He has since folded away a couple of loads without prompting. But as a pp said, it feels so tenuous because deep down you know it will all fall back down to you if he 'drops the ball'.
What a fucking game.