I am 22 weeks pregnant and i have been using the patches to give up after getting advice from my dr and i have been absolutely fine. The only thing you must remember is that if you are stressed the baby can feel it too, just relax as much as you can.
Its better to slowly cut back since if you are addicted it can cause stress to the baby. With that being said my first pregnancy I smoked a pack or two a week and quit cold turkey and she was fine.
My sister was about 9 weeks when she found out n se also stopped n our little sammy came out fine