Overtime overtime overtime

Why do I, no matter how hard I try to keep a calm schedule, always end up insanely busy at work during weeks when I really want to spend time on non-work stuff????

Urgh. How do I turn off that pesky sense of responsibility I have? I know I can't keep overworking myself like this, especially since I've already burnt out once, but I work in healthcare and if I slow down, well, then people will have to wait even longer for help. And while I know it's not my fault we're not paid enough per patient and that there's too few of us employed to be enough for all the patients, I still feel that niggling guilt whenever I have to tell someone our current waiting time for appointments.

I might miss signing up for Yuletide. I really really hope I don't because I love doing Yuletide, but...work...