Greg, hopefully, getting back on your normal schedule will keep the insomnia away. The headache could be from sleep deprivation and/or lack of caffeine. I'm a caffeine addict -- coca-cola, not coffee -- and I get a headache if I don't drink it (a RARE day)
. Caffeine has NO affect on my sleeping, however, as I can go to sleep right after finishing a large Coke.
Hope you feel "bright and bushy-tailed" today (wonder where THAT phrase got it's meaning?), and get a good night's sleep tonight, AND get a lot of beautiful artwork done!