With so much on your plate right now it's easy to be overwhelmed by it all. Take a really deep breath, remember YOU are the one that's important. If you need to take a break from it all, even if only for a few minutes to regroup then do it.
Do not let yourself become to caught up i all of this or you won't be any good to any one, including yourself. It will all end, whether or not your crabby about it.
Chin up, vent when you need to, at least that way your getting some of it out.