Quitting smoking while pregnant?

I was smoking a pack every two days. I went down to two cigarettes a day. Then one. And now I'm having a drag when my SO has a cigarette. Just wondering how easy it was for you to quit and what you did to quit. Any advice would be wonderful. And no I don't need info on the dangers of smoking especially while pregnant. I do know them which is why I'm trying to quit. 

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