Welcome to the community!
If you have a reasonable boss, I would tell hm/her that you are quitting smoking and that this can be a problem at times. Remind them that you will be so much MORE productive after this initial stage of quitting - no more smoke breaks, or jonesing for a fix when you are working. You will find that you feel LESS stressed in general when you quit - because when you smoke your increasing level of stress is created by the last cigarette you smoked. Read on to understand why this is so.
The important thing you can do right now is to educate yourself on what nicotine does to your body and mind. To that end, I highly recommend Allen Carr's “The Easy Way to Stop Smoking.” You can search for it online or at your local library. Here is a video to inform you further about nicotine addiction: https://www.youtube.com/watch?v=IpWMgPHn0Lo&feature=youtu.be.
Let me know if you decide to use a quit aid and I will give you my thoughts on them.
It will be informative if you do the tracking and separation exercises recommended here on the site. As you track each cigarette smoked, note its importance, and what you might do instead. Put each one off just a little to prove that you don't NEED a cigarette just because you think you do.
The idea is to change up your routines so the smoking associations are reduced. Drink your coffee with your OTHER hand in a place different from when you smoked. Maybe switch to tea for a bit. If you always had that first smoke with your coffee, try putting your tennies on right out of bed, going for a quick walk, then taking your shower and THEN your coffee! . Take a different route to work. Take a quick walk at break time where the smokers AREN'T.
You need to distract yourself through any craves. You can take a bite out of a lemon (yup - rind and all), do a few jumping jacks, go for a brisk walk or march in place, play a computer game. Keep a cold bottle of water with you. Don't let that smoking thought rattle around in your brain unchallenged. You might visit “Games”: https://excommunity.becomeanex.org/groups/games. The active ones are at the top of the list going down the left side of the homepage. Here is a link to a list of things to do instead of smoke if you need some fresh ideas:
https://excommunity.becomeanex.org/blogs/Youngatheart.7.4.12-blog/2013/02/25/100-things-to-do-instea...
The conversation in your head in response to the "I want a cigarette" thought needs to be, "Well, since I have decided not to do that anymore, what shall I do instead for the three minutes this crave will last?" Then DO it. You will need to put some effort into this in the early days, but it gets easier and easier to do.
Stay close to us here and ask questions when you have them and for support when you need it. We will be with you every step of the way!
Nancy
