My one year old daughter has RSV and is coughing constantly in her sleep?

Is it normal for my daughter to cough all night in her sleep? She has RSV and this is her second day with it. She's never had a cough or any kind of chest cold since she was born.. so I don't know what is normal. It's a really congested cough, not dry. I'm also widowed so I'm doing this alone. The doctor said the RSV is nothign to worry about because of her age, but what should I do for her cough and has anyone experienced this really bad cough with their babies and is it normal?