I ended up with a slight headache behind my right eye this afternoon.
I'm pretty sure it's just from me trying to concentrate on writing like the entire day. 
As I've been working on editing a couple of chapters of an old wip I've had for a while and at the same time I've been watching shows and listening to music. So I'm pretty sure that the constant divided direction wasn't good and strained the muscles. 
But I'm trying to make sure I'm hydrated and have a heat pack currently on that side. With some Tylenol hopefully it will fade away.