C.P.
Hello Liz,
I hope your baby girl is not coughing anymore. here is what I use with my kids:
on a tissue put:
5 drops peppermint oil
2 drops rosemary oil
1 drop basil oil
you can put the tissue in the room your daughter is in and in her bedroom at night. make sure you replace it on a daily basis because the tissue will smell kind of funny after a couple of days.
you can get the essential oils at sprouts, whole foods, health food stores, gnc, etc.
Good luck! ~C.~