Delayed Stress?

I almost think it was a delayed reaction to the stressful day I had at work the day before.
As I couldn't think why else I'd wake up from my nap with a headache.
I mean...yes, I do wake up from naps with headaches.
But I think stress from the previous day finally caught up to me.
Because there was no reason for me to get such a major headache otherwise.
*shakes head*

Whatever the case, it was bad this time.
Staying with me through the night, and into today.
No matter what I tried, the headache refused to leave.
Which was annoying.
Since it made it difficult to do things today, but at least I had the day to do nothing to let it wend it's course.