Okay so for the past 30 weeks of my pregnancy I have been living at an individuals house who smokes…

Okay so for the past 30 weeks of my pregnancy I have been living at an individuals house who smokes indoors even after telling them countless times not to...Whenever they smoke I go in my room and shut the door. Sometimes I go downstairs and can smell leftover smoke from when they were smoking earlier..So it isn't directly being blown in my face but I feel like I somehow am inhaling it..since I can smell it...I feel terrible and I am always worrying that the second hand smoke will harm the baby. It's been bothering me a lot lately. We are finally moving out tomorrow and getting our own SMOKE FREE place..just wish it could of been sooner. :/ does anyone know any info on second hand smoke? Does it put my baby at any risk? Or should I not be worrying so much? I want my baby to be perfectly healthy.