Headaches: the cause?

Today I went to work. I wore my hair half up in a pony-tail.
Now, I have a headache. I wonder if it is because of the ponytail. I let my hair down hours ago, but I still have a headache.

Then, earlier this evening, I received a call from ManPower, on behalf of my boss, Jill....I've been let go because I didn't work fast enough. I don't want to talk about the details.