Your kids are your reason to stay alive. I don't have real kids but my pets are my reason for staying alive. I too have a stressful job, where I get chewed out for the pettiest of reasons, but i just smile and say yes. Sometimes I am asserive if they are being ridiculous. Stand up for yourself, and explain exactly what happened, and try to be calm and patient. You will be fine. Just keep on deep breathing. Think of the good stuff you have to be thankful for. there might not be much, but I'm sure you can think of something. Keep on fighting, it's worth it.