My first was unplanned and I was a 20 a day smoker. I quit cold-turkey as soon as I found out and it was HARD. What worked for me was, whenever I felt the urge for a cigarette, I pictured my little baby in my belly choking on a cloud of smoke! The image was disturbing enough that it put me off having a fag. Keep some normal chewy handing and busy your mouth with that when you feel the urge to smoke. I also ate a LOT of apples!

Good luck and congratulations!