Feel like a ticking time bomb

I walked into the house tonite after work... agitated... I knew I was on the brink... it wouldn't take much. Sure enough it wasn't long before my wife and I got into a HUGE argument over nothing. I even left at one point threatening not to come back. You know what I was thinking about when I was out driving around?..." I can't handle this, I need a smoke!" Even drove by the local smoke shop,quit smoking now, but I didn't stop... went home instead. The whole things embarrasingly stupid and I'm not proud. I know we'll make up, but tonite...I'll be sleeping on the couch,smoking cessation, still on the brink but smelling good.