First time mummy

Hey ladies, so I'm a first time mum and have just found out I'm 6 weeks pregnant. This wasn't planned, and I am a smoker do any of you know of any safe ways to quit I'm quiet a heavy smoker so just giving them up will be hard. I know it's what's best and I want that. Just wondering if any of you have used the Nicorette patches or chewing gum and if it safe to do so whilst pregnant