Hey Carrie,
I do not know if you knew this, but not only does my son have CF, but my mom did, too.
My mom had a very difficult time with perfumes, hairsprays, etc. She also had an asthma component to her cf, so I don't know if that makes a difference, but I remember times when we would have to leave church, card shops with scented candles, etc. And if it were a special mass that called for insence, Watch Out! That would push my mom over the edge and I'd take her to the parking lot to cough it out.
Some people are just more sensitive to scents, too. I'm one of them, and I have no lung disease at all. I can only imagine what a sensitivity on top of a lung disease would feel like!