I need a recommendation for a good cough remedy for my 11yo DD. She has had a cough for a couple of months now. I've had her to the doctor and it is not bronchial. The dr. said it was allergies and gave her Singulair samples. That seemed to make it a little better, but it still hasn't gone away. Now I've noticed in the last couple of days that it is getting worse again. (She's still taking the Singulair) I've tried all sorts of OTC cough meds but they don't seem to work. What should I try?