I Can't Do This

Just when I thought things were getting better, we are hit by a bad day. Mr X is moody and temperamental, he even shouted at me, something very uncharacteristic of him. It hurt like a stab in the heart. I don't know how much more of this I can take. Between the children wanting my attention, the lack of sleep at night from waking up for Master X and dealing with Mr X, I just feel like I've had it. I hate saying I can't do this cos I'm not a quitter but its getting really difficult.