Much respect Helen. Best thing I ever did (other than leave my ex) was quit smoking when I was 30. I would have a mint instead of a fag which really helped. Had to stay out the pub for a few months until I was sure I got it covered & I ate more too but as food is generally considered better for you than nicotine I didn't mind. This might sound odd but if I got a craving I would just take a huge deep breath & fill my lungs with lovely fresh air instead. It helped I promise you.
You MUST keep it up now you've come this far. Imagine how disappointed you would feel if you had a cigarette now!?!?!?