Congrats for not giving in! Outside influences can make it much harder, but it does get better in time and the last thing you want to do is harm your body (and progress) for something that won't matter in a little while. If you can, the next time you have the urge to buy a pack, maybe just go buy a flavor you've never tried from a B&M nearby. Perhaps that can be enough of a distraction to get you through the spell? And even if you do buy cigs, don't give up. Falling off the horse isn't a horrible thing as long as you can jump back on and keep trying. 
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