The stress is getting to me and I don't know how to turn it off

Work has been insane the last few months. Understaffed, project deadlines crushing us, emails at 10 PM about stuff that's not even close to urgent. I come home exhausted and I don't have patience with my kids like I should. I snapped at my 6 year old yesterday for something stupid and he just looked at me with those eyes. I love my job but I hate what it's doing to my family. Anybody else dealing with this? How do you compartmentalize and actually leave work at work?