J., do not ask for break, just take it. Just inform him that you will be going to... and coming back...
My husband is not much better than yours but I jog, travel (with one kid at the time) and refuse to go without a housekeeper. The way I look at it, why is it my job? Who said so? I am at home for my kids, so I deal with the kids, and that is you know, a full time job. As far as the other chores, I get done what I can and the rest just doesn't get done. The rest, on my list, is cleaning, cooking for him (because he is the main eater, the kids and I eat very little comparing to him), wash and iron his shirts (that's the one that is most annoying to him). So, he insisted we get a housekeeper, so HIS life runs smoothly. He is happy that his clothes are spotless, someone picks his underwear on the floor, and puts food in front of him every day. I do not need that so why should I be held down by this standard? My life is fine the way it is. As for grumpiness, I cannot tell you how many times I hear the same things you probably hear about doing nothing, taking too much time for myself, not being available to him... blah, blah. Who cares? I let it all sloth off me like a muddy water. Thank God my guy and your guy works a lot - imagine having them at home more! Let your hubby went, the way these boys are, they never be happy even if you worked 24/7 and dropped dead on the job. He probably would complain that this good for nothing hag dropped dead and he has to pay for her funeral. Do not kid yourself, take care of yourself, girl. If you stop doing some of the things you doing, what is he going to do? He will be upset, yep. But what's the matter, according to him, you don't do much anyway, so it should not be a problem. PM me if you need some more tricks. Cheers!
Added: No counselor is going to help you because these boys see no fault in themselves! You can fix your own guy! You just have to be smart and do it gradually. With 3 small kids you are not in the position for huge demands and drastic changes. Make small but meaningful changes, so you feel less like a prisoner, and with time, you will see what to do next.