You can use NRT while Breastfeeding. Vaping will not carry any extra risks for your baby (although obviously not wise while actually feeding or holding the baby). Either of these is a massively better option than smoking, both for you and your baby.
The trouble with scaremongering over ecigs is that people are misled into believing that there is no benefit in switching to vaping if they are unable to give up. This actually costs lives.
This is arse gravy:
Blow some exhaled vapor onto a cleaned smooth surface a few times, then take a clean oil free finger and wipe along where you exhaled the vapor.
See the result? Yep, that's in your lungs.
I am not trying to scare you, I want you to be informed, that is broken down by your body, but you should never be under the impression that vaping is a safe alternative to smoking, it is not.
You can try this experiment for hours and hours - there is no residue.
If you want decent info on the risks and benefits of vaping this is a good place to start. You can access the whole paper for free if you create an account. Vaping is not risk-free (nothing is) but it is orders of magnitude safer than smoking.
If you would prefer to play it very safe and go cold turkey that's great. If, however, you find you are not coping with the cravings and are about to have a fag, don't worry about using the ecig. Come over to the stop smoking section and we'll help you find one that works. Actually, come over anyway, you'll get lots of support and no judgement, whatever method you are using 