Your doing fantastic!
I wished the same thing you do when Chantix first came out!
You could fill those "odd moments" at home with a craft that you enjoy.
I did that and it really helped.
1. Write a memory book about you and your life for your children.
2. Hand write a recipebook for someone special.
3. Take up crocheting or knitting.
Just find some kind of craft to do while your sitting and soon you won't have those odd moments.
I also find myself thinking when increment weather comes...man! I am so glad I don't go out there anymore!
Have you thought about your clothing?
Do your clothes smell like smoke? Air them out or wash them.
I am just giving you something else to think about.
I did some of these things and it helped get rid of those moments.
Being a nurse your probably pretty tired from your shift so maybe you won't want to do any thing.
Just trying to help.
BTW: A puzzle book helps at work too!