When my little guy had croup he was 15 months old so not as young as your DD. The first couple of days were the worst. He hardly slept & when he did we had to wake him for his medication, which at least worked quite quickly. We didn't have to take him to hospital but our GP told us if he became too distressed or seemed to be struggling to take him straight in.

Our biggest problem was keeping him quiet! If he ran around or got too excited he'd start coughing again & would get pretty upset. So we did lots of reading After the initial croup Moo also got a secondary cough from his little immune system being so low, so he was sick for at least a week.

Poor little miss, croup is awful. I hope she gets over it quickly