Hey, Nonotyet. Welcome. Feeling irritable is absolutely a normal response when we stop drinking. I was more weepy than irritable. I would have preferred irritability.
Be good to yourself. Quitting drinking is huge. So is quitting cigs. Both at the same time? Ginormous.
Myself, I would take it one thing at a time. Get some good solid sober time, then try again on the cigs. The first few weeks of sobriety are an emotional roller coaster. Things will settle down in a while. Good luck.
Andif you want to sleep apart from spouse and you have the room, go ahead. Getting good sleep is super important in the early days.