I have to fake it. My job relies on my being able to be there for my students no matter how crappy I feel. What I have always found is that I am much more stable on the job than off it. I am able to keep it together and focused for my students and I really am healthier during the school year when I have my kids to keep me "up" than in the summer or vacations when I have too much idle time to do too much thinking.