The first thing is to be aware, which it sounds like you are. It’s ok to feel irritable, but we don’t want to act on those negative feels. If you do with someone, take responsibility, “I’m sorry, I’m in a bad mood today”. It will pass, you may need to find other things that promote positive emotions, exercise, positive touch, petting a dog. I’ve also had to break fast due to mood and difficult emotions. I think it comes from depriving ourselves from a regular source of joy we get through eating, and it can be difficult to fill that space.