Suggest Treatment For Anxiety After Quitting Smoking While On Nicorette

I am a healthy 45 yr old women that exercises regularly and eats pretty healthy. I have 4 children between ages 5 and 18. I had smoked years ago but quit after having children. I do still chew Nicorette gum a few times a day to take off the edge of anxiety. I have not smoked a cigarette nor desire too, but I do enjoy the gum as it seems to calm me down. I have a life insurance test coming up and I am afraid they will say I am a smoker even though it has been almost 18 years since I have actually smoked a cigarette. Not sure how long it takes to leave the blood stream as I believe it is a blood test. Thank you for any advice.