hi Seana,
Is Courtney coughing alot? Does she have an active infection? When my daughter was coughing alot she had "bloody boogers". I think perhaps it was broken blood vessles . She happened to be quite sick at this time and ended up getting IV's and cleanout. As soon as she stopped coughing and was on the antibiotics it stopped.
That's what happened with us. Could it be the air is dried out from the heating system?(if she doesn't seem sick)
Maybe someone else would know more.
Rebecca(mom to sammy 7 no cf Maggie 3 with CF)