I have a slight headache developing behind my left eye currently. 
I'm guessing it may be from leftover tension of dealing with the tension in the store of having our DM visiting this morning.
But since it didn't start building until like dinner time...I'm wondering if there's another factor playing here.
As I did try to take a nap to rest, but kept getting interrupted by texts and phone calls from people. So maybe I just didn't get enough sleep today?
Was I stressing over writing too much?
Did I not eat the right amount of food today at the right time?

Hard to know for sure.
Hopefully sleep will help it go away.
But I guess I'll have to wait and see.