Please don't be angry with me when I say YABU to want to scream at your DH for singing when everything else is falling apart.
We are constantly living about 3 weeks from nothing at all, the worry and seriousness of it all are very real.
I sing, I dance, I go for walks, I laugh with the children, and goof around. If I didn't I would fall apart. This is my life, and those little moments of joy make it bearable, make it worth it actually. The bits in between the worry.
I try to get done what I can get done, I deal with everything in my area of influence, I work through the list of deadlines and debt-d-days one by one, I do all I can. I refuse to allow it to impact on every part of my life.
I know you're poorly. YANBU to be affected the way you are and YANBU to find it irritating. YABU to expect everyone else to be serious and morose at all times in the kitchen, what problems are in the kitchen? What problems can be solved in the kitchen? What is the problem with thinking FUCK IT and dancing iin the kitchen?
I do understand the frustration with living with someone who's always done quite well via word of mouth, exactly the situation I'm in... he has to seek it out now, and it's not a strong point of his. Yes, that annoys me greatly, I've turned into his PR guru, but I can't actually get him the work, his business doesn't work like that, all I can do is research possibilities, the rest he has to do himself.
I am not sure what help is available, and I know it's fashionable to bash anyone on benefits, but I would go and see if there's any help available for you in the short term. x