It was tension between my right shoulder blade and spine in the muscle there was causing my head to ache. Probably just reacting to the stress of the managers emanating from them because we had corporate dropping by to visit today to check out our adoption event and they were stressing out over making sure it looked good. 
But taking some Excedrin and resting with a heatpack on my break seems to have helped it.
Though now the medicine has worn off...so more Excedrin has just been taken and hopefully it will help the resurgence of the headache to die away again.