Thank you for the extra information.
Sounds like she has a bit of an upper respiratory infection. This is pretty much like our common cold. It can cause a array of symptoms from a sore throat, swollen glands, coughing, sneezing, runny nose and eyes.
It is viral and many times just needs to run its course.
You can try a drop of mineral oil or olive oil to lubricate the larynx. Not too much though, you don't want to give her diarrhea. This won't fix the problem, but will aid in a scratchy irritated throat.
If she does not get better in a week, or gets worse with other symptoms, you will need a vet appointment. Sometimes a URI can cause secondary bacterial infections that need an antibiotic to fix.
If she does develop a runny nose, eyes, or sneezing, you can give her a 1/4 tablet of Chlor-Trimeton every 12 hours. This is an OTC antihistamine like benadryl. You can find it at any drug store.