Heavy smoker pre pregnancy

i tried hard to conceive naturally but can't, so we went thru IVF, and finally i got preg last Dec 2022 and gave birth in Sept 2022. Even during the process I was still smoking on and off. once I tested positive, i can't stand the smell of smoke and it just automatically made me quit. now my baby boy 5 mths, the temptation to smoke back is strong furthermore my husb is a smoker. but i told myself. i went thru so much to have my lo just to waste my health away. what i can say to u is, put ur heart and mind into it, if u can't quit immediately. then try a few puff on 1 stick for a day. slowly but surely. keep in mind, ur body is carrying a new life that u will embrace in 9 mths time, which u will also want him/her to be healthy. u can do this mummy!