My brother in law just lit up in the car when i was sitting behind him. He had the window obviously and it was only one. I've never been around people that smoke and obviously i've never smoked so i'm panicking because i know smoke is bad when pregnant but i've never had to think about it before so i dont know much about it. Im 35 weeks, should i start stressing over one cigarette?? I know this is probably the most stupid question ever to be asked on mumsnet but i really dont know enough about how much smoke is too much because ive never had to worry about it. Sorry if this is just me being silly x