My son is now 18---------- but one of the things I did was to find a couple other moms to switch child care with once a week.
That way you get some time away or in your tub during the day once a week to yourself------- an hour or two can work wonders.
If that's not an option, do you have a local YMCA? They usually have very resonable family memberships and on site child care.
Good luck and if I were close enough I would cuff your hubby in the back of the head for you.