I have recently done pretty much the same thing, nic free for 4 weeks or so now and all good.
In fact we had a BBQ/ House warming last Saturday night and I smoked 2 ciggies (was quite drunk at the time
) during the night and I didnt grow horns, or want to resume nic.......I love that for me I have full control over something that used to have control of me, I now do it by my own free choice, just as I only drink booze when it suits me (not all that often but you gotta let go now and then and remind yourself with a decent hangover why you dont do it all that often, lol).
Cheers Rob
PS: Well done Dazza!!