I can certainly relate to what you said Stewbum! I remember my first few weeks being one of the most mentally disconnected times of my life. Brain fog prevented me from functioning normally at work at certain times. Dealing with those stressful times when you'd normally go out for a smoke were tough to deal with as well. Also, a tendency to fly off the handle at stuff that normally wouldn't bother me was an issue for quite some time as well for me. How did I get through it? Just my steadfast commitment not to smoke! That was the number 1 priority in life for me throughout that first year. Quit always came 1st, everything else behind it.
Sounds like you're of the same attitude so you should be fine. It won't be fun but it very doable and WILL get easier and easier with time. Patience is truly a virtue when it comes to quitting smoking