6 mos. is still new in smobriety so it is not unusual to be thinking about a cig now and then, even craving one. There is a pretty good website
Quit Smoking | Quit Smoking Support | Smoking Cessation that I found helpful that will email you everyday if you would like. They give good ideas on how to keep your hands busy, etc.
You have to find something(s) to replace the habit you had for awhile. Or at least do something distracting during those few moments when a craving or desire hits. Hope I said anything that may have helped. Good luck on your continued journey of not smoking.
By the grace of God, I have been smober for 2 years and 2 mos.