I ended up with a slight headache behind my left eye today after I put in my contacts but then it jumped over behind my right eye and stayed there for most of the day as a faint ache. Annoying but easy enough to ignore for the most part. 
However Excedrin and heat would make it go away throughout my work day and due to work stress it was hard to relax and such.

But after a brief foray back over behind my left eye the headache finally vanished with the setting of the sun...and because I got distracted dealing with stress of the dentist. But I'm glad it finally faded away.