Puppy emergency- what should i do?

I had that problem with my dog too and she's a beagle and she has been coughing a lot and a lot! We were so worried we took her to the vet and they said give her these lung pills cause they didn't find anything wrong about her and she still coughs so just relax cause one day i also went to a walk with my dogs and an other dog had that problem and she said it was ok so it's normal for dogs.