Nothing can snap me out of a mood. I just got my period back for the first time in a long time last week, and my SO was laughing at me because I was so bitchy, and I didn't even know why lol. I was just sitting there in a bad mood, and he asks me whats wrong, I couldn't tell him. I had no idea, all I knew is that I was in a bad mood, and was extremely aggravated.

It helps when you're able to recognize that you're in a bad mood, and there is no logical reason why. That way you don't take it out on someone else.