Im going through the same thing kind of. My dad smokes cigarettes and weed in the bathroom. When I have to use it he comes out and there's usually smoke behind(not much). He closes the vents and puts things at the door so the smoke doesnt fill the entire house. He say's that washing the the walls with vinegar eliminates the smoke. Am I still being affected by it?
Unless the person you're with is hot boxing the room yeah you get high , especially if it's some dank and not some stress . But other than that you're fine :)
Its a prooven fact that you can go fro florida to canada and back in a bus everyon on that bus can be smokein weed except for you and you would pas so you have nothing to worrie about but idk about harming the baby.
When your smoking weed or cigs all your doing is inhaling the smoke in your lungs in and out why wouldn't it be in your system if your breathing the smoke in and out even if the blunt isn't touching your lips?! To me it would come out in your babys system
For the safety of your baby, just don't be around it geez