I'm not sure if you have any family close by, but having some sort of support structure will help.
For me, having my mom around has been that extra support when I need it, not every day, has been awesome. I'm still quite exhausted, I still do 90% of the care for the house and children, I am a sahm and I should be used to it...but with the exhaustion, my stress level is higher.
I'm hoping DH gets better soon, and I'm praying I don't get sick...the household can't afford it.
How old is your older child? Mine is 4.5yo, and have yet to figure out how to take both kids out by myself out on any errands or parks. Its a little intimidating.

glad I'm not alone in this PP environment.
Re: *-*wedding06*-*
When your baby naps, rest. Lay down...watch tv...or nap...just clear your mind a bit. It goes KIDS are Priority #1, then you - remember that!