Well, the good news is my bad mood on Saturday finally passed. And I found out there was a full moon that day. Explains it all.
According to Wikipedia, Full Moons are traditionally associated with temporal insomnia, insanity (hence the terms lunacy and lunatic) and various "magical phenomena" such as lycanthropy.
See? It's TOTALLY not my fault I wanted to strangle my husband. It was caused by the moon.
Here's hoping, anyway.