Thanks, everyone for your good energy. It was a truly awful shift at work... one of the worst we've ever had... but I got through it. Somehow, I was able to just do what I needed to do in the various crisis situations, and didn't end up in the bathroom crying. And now, I plan to sleep for about 10 hours.
SophiaG, I had to chuckle at your post.... I'm finishing up a master's degree in psychology, and have quite the library of books about depression. And yes, they have been helpful. It is an added challenge though, applying what I know clinically to myself. I'm much more judgmental when it is about me.