I smell smoke

A few weeks ago I smelled cigarette smoke wherever I went. Im not a smoker, nor is my husband. I've never seen any of my surrounding neighbors smoke so idk where the smell was coming from. I haven't smelled it in like 2 weeks though and I'm 29 weeks. Maybe it'll go away soon for you too. 

I smell cigerettes everywhere and I hate it of course my sister and her gf smokes but my room is upstairs and theirs down 

I was just talking to my doctor about this. It happens to me whenever I am having issues with my sinuses. Like a sinuse infection. 

Not smoke but I can smell my cats litter box and it's OUTSIDE 😡