early to bed tonight

I went to bed around 10:30 last night and felt like it took me a while to fall asleep, but I got up fine this morning (6am).  I mean, I didn't want to get up, but I didn't snooze my alarm or anything.  In part because I had a 5:30am CST phonedate to ensure my bff got up for the start of the latest round of "no one should have to be at work that early."  Once I was up I was kinda like on auto-pilot -- go the gym, etc.  Once in the office, I didn't have as much work as I was expecting.  Two people in two days have been surprised that I didn't go to the conference again this year.  *shrugs*  I got a headache partway through the afternoon :(  I suspect this is related to my not having gotten enough sleep.  I am also blaming not-enough-sleep on the fact that when I left work tonight I felt uncomfortably cold.  (I was fine by the time I got to the T.)