I woke up with a headache this morning. *exhales* I think it was from sleeping tense? 
Maybe I was hearing the beeping of the fire alarm's dead battery.
Or the annoyance of having unexpected problems in the morning....

In any case. The headache came and after conference got much worse. Into migraine mode. To the point where I had to just crash for a bit, take a shower, and some meds....and yah...
Headache did vanish long enough for me to be able to make it back home with no issue.