Thanks for your query.
Smoking during pregnancy
has various side effects on development of baby but it is not cause of jaundice.
Jaundice in babies could be physiological which usually develops by 3rd day and settles by 7 days.
Pathological jaundice persist for more time and it could be due to various reasons.
Blood group incompatibility
,low birth weight
,infection.breast milk jaundice etc
I suggest you to get baby evaluated by pediatrician
to look for level of jaundice and manage accordingly.
Wishing baby good health.