I am sorry your girl has this issue.
Is she doing this?
Dogs get upper respiratory infections, kennel cough and canine influenza Some are so contagious, they can come in on shoes. I will try to cover every possibility.
It can also be kennel cough, a reverse sneeze, an allergy or swallowed non food item.
Excitation does worsen this condition.
Check inside her mouth for a stuck item, sore or any abnormalities. Look under tongue, roof, cheek pouches and between her teeth.
If you dont see anything she may have swallowed non food or have a slight upper respiratory infection coming on.
Give her one mg per lb of benedryl every 8 hours.
Keep her on a very light diet of boiled chicken or cottage cheese for 48 hours. Also give her one teaspoon a day of plain yogurt to keep "good" bacteria in her system.
She should see the vet if she gets worse or developes any breathing difficulties.
I hope I have covered every possibility. Please let know if you still have questions and how your baby is doing, I will always be here for both of you.
I hope she feels better very soon.