I am sorry your girl is not feeeling well.
Dogs dont get "sore throats" the way we do but they can irritate the esophous swallowing a big piece or rough item.
Check inside her mouth for anything stuck, a bad tooth or any abnormalites.
She may have a bit of an upset tummy.She cn have a tsp of pepto bismal which will coat her entire GI tract.
You can also give her an inch of cat hairball remedy or a dab of vaseline to swallow.
If she continues swallowing and licking I would pick up any dog food.Try a small amount of boiled chicken with all fat drained off, cottage cheese, or baby food with no onion, beef, turkey, etc
Go very slow so she does not throw it up.
Dogs get dehydrated and hypoglcemic very easily.
Add unflavored pedialyte to her water 50/50 to hydrate her and balance her electrolytes.
Put a drop of pancake syrup on her tongue to raise her blood sugar in case she is a bit hypoglycemic. That should perk her up.
Do not allow her to drink a lot at a time If she throws up water, she can lick ice
She may have any human OTC at www.wolfdancer.org/health scroll down for products and dosages.
Keep her on that 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.
If she developes any adominal pain, bloating, constipation or cannot keep anything down she needs to be seen by a vet right away
Please let me know how she is doing. I will be here for you all weekend
I hope your baby feels better very soon..