How to handle the irritability that comes with quitting?!?!

I’m a few days into a nicotine-free lifestyle, and the physical symptoms are gone. One thing that still plagues me is the irritability. It’s only been one night on this level (we’ve both been sick so have naturally kept our distance from each other until now), but I feel like it’s driving my SO and me apart! How do I cope with the irritation and desire to say something rude whenever he talks to me?