*POSSIBLE TRIGGERS: I'm gonna go with the 13+ hours I slept that night. I woke up somewhere after 7 hours, but was so tired and figured that I had no reason to get out of bed that morning so why should I... I know better.
** I felt like a zombie all day, almost hungover. The pain didn't start until early evening/late afternoon. At first it was just in my eyes, then it was all around them, next to them, and in my forehead. Later it was on the sides of my head, behind my ears. I experienced light sensitivity most of the day.