When I was working, there were times when the sight of the entrance gave me a massive headache that lasted my entire shift and co-workers with their petty politics drove me up the wall... And being there just made me feel undone. I took sick leave when I honestly couldn't handle being at work without throttling someone, home was my sanctuary at these times. That being said. I'm sure for me it was mostly work-related pressure that caused it. I would never opt to stay at home, I just don't have it in me. Have you taken an honest assessment of your work environment, The people, your tasks, the whole dynamic? Maybe the fact that you have to be there as opposed to want to fuels your symptoms...