I've had a slight headache behind my left eye for most of the day.
It started this morning probably from a) not getting enough restful sleep and b) reading too early in the morning before I went to work.
And it hovered throughout most of the work day because I had stressful coworkers around me for the first portion of my shift. So I was doing my best to try and keep myself calm and focused and not let their stress get to me.
Which it's hard to stay focused on anything when there's nothing to do lol. Part of the reason why I don't like evening shifts...if it's a slow day customer wise that means tasks get done so much faster and I ended up finishing the tasks we had to do like...within the first couple of hours of my shift. So booo that. 
But I'd managed to make it mostly fade by the time my shift was over....though the stress of talking to a new person after work had it coming back because ahhh new people. 
Hopefully I get a better night of sleep tonight to make the faint headache fully go away.