Dd is fine during the day,yet is waking herself up more or less every hour from coughing.it started 2 weeks ago with her waking up omce or twice a night,but over the last fewe nights has gotten worse.doctor says its left overs from a virus.she's 6months old-we raise her head,give her cough syrup and spray saltwater up her nose before bed.any other suggestions??is it ok to give a bottle of warm tea to sooth her cough during the night?