Pregnancy issues aside, smoking cessation should be the health intervention that you and your husband make immediately. Heart disease, and a multitude of cancers are dramatically increased by smoking (and being exposed to second hand smoke, even if you yourself are not a smoker), and no matter how long or much you smoke, your risks will be reduced if you stop.
Having said that, it's easier said than done, because nicotine is addictive. There are many mechanisms out there to assist you in stopping, and these should be initiated long before you try to conceive. Patches, pills, gums, therapy and alternative medicine options (such as acupuncture) are available. Speak with your doctor about what is best for you and how to most effectively and efficiently quit, preferably before you conceive.
Smoking in pregnancy increases your risk of low birth weight and growth restricted babies, as well as premature placental separation (abruption) and placenta previa. Babies that are exposed to smoking after birth are at higher risk of asthma and SIDS (sudden infant death syndrome).