Your fertile window includes the day you ovulate and the preceding five days. So, for example, if day 1 is the first day of your period and day 28 is the day before you expect your next period, you'd be fertile on days 10 through 15. (But you're much more likely to get pregnant during the final three days of this window.)
Your body will recover much of the psychological craving, that is, it will stop doing the cravings by 1 to 2 months after you have quit, and then it will be time to taper the pill and the patch.
How Long Recovery Takes. According to the American Cancer Society, the detox and recovery process after quitting smoking starts after you finish your last cigarette. Within 24 hours, your heart rate and blood pressure drop, and in the next one to three weeks, lung function and circulation improve.