I'm feeling (physically) awful today. Worked a 16 hour double shift last night, from 3pm Saturday until 7am this (Sunday) morning. It was a good trade-off in theory, because I made that deal so I wouldn't have to go in for my 8 hour shift this afternoon (I just did two 8 hour shifts together instead) and then I would have all day today off and all day tomorrow. However, I feel miserable. I slept fitfully when I came home this morning despite taking sleep meds, maybe only slept 2 hours. My stomach feels awful and I've been throwing up. I still feel exhausted but can't sleep. I worked third shift for five years; I don't know what's wrong with me.