J.G.
Yep, Vicks on the feet. Also a cool mist humidifier in the room can work wonders. Cool mist because it doesn't promote other bacteria from growing on the humidifier that can cause other issues. If her cough gets too bad get her to the doctor. But in the mean time, if she's coughing too much, take her in the bath room, close the door, and run the shower on full on hot. Steam it up in there. Should ease her coughing. Might help her nose open up if she stuffy too.
Good luck! I hope this passes quickly for you and she's back to being a happy baby.
Jen
http://www.mommysjoy.com