Smoking cigs after birth

Yes, i know I'm going to get rude comments. But! I'm leaning here for advise. I want to breast feed of course. I was a heavy smoker before I found out I was pregnant. I stopped cold turkey. But I miss it so damn much some times. So question, any smokers here pick up smoking again after birth? How long did you wait? I'm thinking of using a vapor but I won't until I know I'm gonna stop breast feeding. But the keep up is going to be massive making sure my baby doesn't get any scent from it from me smoking.