Thank you Doni!

[stitchwhich]

http://www.sleepdisorderchannel.com/dsps/index.shtml
http://en.wikipedia.org/wiki/Delayed_sleep_phase_syndrome

Oh. My. Goodness.
I had no idea there was a name for it...
(Why is it a label makes something so stressful more bearable?)
(That was a rhetorical question.)