Ha, yes, dh and dd know when I'm pissed off as I'm doing crazy things like washing the skirting boards :)
It's was leaving dd without a Mother that scared me more than anything too, and something I've been anxious about since she was a baby, when I found my lump I held off too as it convinced myself it was my anxiety talking because a part of me expected it to happen for years, than when a lump did appear I talked myself into believing it was nothing and would go away, sounds silly I know.
Dh said that's what worried him the most also, that he'd be ok eventually but that dd would struggle and he didn't think he'd be enough for her to be ok, he's made changes since. He does not take me for granted anymore, he takes an interest in what's happening at school, helps around the house so much more too. I think it gave him a shock. Don't get me wrong, he wasn't a shitty dad or husband before, but a lot of things ticked over in the background and I think that as he had to do everything after my surgery, he realised there's a lot of little things that he doesn't see get done or have to worry about as he has me doing it for him, he now does a lot of that himself. Hope I'm making sense.
I don't know what to suggest about your dh, I'm crap at relationship advice, but it sounds really hard for you and I'd have resentment towards him too. It's not nagging to expect him to take things seriously, and the accusation of nagging is often used to shut people up. Health scares are hard enough without a unsupportive spouse, I'm so sorry you're dealing with that on top of other things. Don't feel bad about having a moan 