Your question intrigued me, cuz my hubby says he will dream of drinking sometimes, and wake up in a cold sweat at the thought of breaking his 6 years sobriety, so I did a little surfing on the web. I found mostly rambling, but a couple of interesting answers.
I didn't save the sites, just copied the relevent bits from a google search "smoking + recurring dreams":
1[quote]
In my limited opinion it seems to me that when you have this dream perhaps you are in a social situation where people are smoking. Your subconcious helps you out at night when you are asleep letting you smoke on a dream level because on another level you would really like to light up again. Dreams let us realise the things we can't or wouldn't do in waking life.
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2[quote]
Almost everyone has experienced one or more dreams that contain anxiety or outright fear. These experiences can be quite traumatic or become recurrent. For some, unpleasant dreams or nightmares repeat in actual content. For others, the content may change while the theme remains the same, such as scenes of falling, or of being pursued or attacked, of being late or unprepared for class, a presentation or an exam. Some people even dream of being stuck in slow motion and unable to move, or of being naked in public, to name a few common themes. Research has shown that most recurring dreams are described as being unpleasant. Furthermore, many dream theories converge in their view that this type of experience is associated with lack of progress by the dreamer to recognize and solve related conflicts in life.
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So it looks like ambivalence in our waking hours can cause this type of dream? Maybe. I just thought it was interesting. And looking it up gave me an hour without thinking of smoking, so if it's helpful to you too, that's a bonus. Some place or other, it said you can "direct" your dreams, if you write some question or other down you will dream about it within a week. I don't know about that, but I do know that your relief when you wake up says you really don't want to smoke, and that's maybe the message. Reinforcement of the drive to stay smoke free, no matter the thoughts during waking hours.
I'll drink to that! ;)
Keep up the great work! 7 months is AWESOME!
[B]My Milage: