I think I figured it out.

I didn't wear my glasses to work today I fogot them and was running late so I didn't go back. My glasses are for long distance, mostly while driving and at night, but I wear them all the time. When I don't wear them, my eyes get tired and I get sort of a headache.

So I think that's why I was in a bad mood. Although, I'm not in a bad mood now and I still haven't put on my glasses... so I could be wrong.