I had a similar experience yesterday. H called early in the morning before he left for work and sounded really wired and weird. I thought it was strange, but didn't personalize it until he got home and was acting really irritable and made a few little verbal jabs at me.
I did start to get hooked in...because I can't remember him acting like that toward me since around the time of the bomb. I was starting to feel very wary. I can't go through life going into panic mode every time he's in a grumpy mood, though...geez. I especially have a hard time with his passive agressive behavior, i.e. pouting about something he's mad at me about, but won't talk to me about it, and then feeling put out because I don't guess what he's mad about or drag it out of him somehow.
So I just asked "what's up? Are you grumpy and taking it out on me or are you mad at me and not saying why?"
It turned out to be just grumpiness from a hard shift at work, and had nothing to do with me.