If I smoke a cigarette out my window at night will my parents be able to smell it in the morning?

So, just to clarify I am of legal smoking age ( I am 20) but I live with my parents and can't go outside to smoke at night.

I smoke quickly out my window and afterwards I keep my window open for about an hour, I wash my hands and spray aftershave/cologne on myself. Maybe I'm paranoid but I feel like my room still smells after.

I want to know if my parents know and they just aren't saying anything or if they really don't know, I also flush the butt down the the toilet every time so it's not the butt that smells.

Am I paranoid or does my room smell? I have also smoked weed in my bedroom in the same way and they haven't said anything.