Sorry to take so long to get back to, but I just signed on and had see you are waiting. Can you tell me if there is sneezing, discharge form the nose or eyes?
Is the cavy eating and drinking?
Is your Cavy Passing pellets and urine?
When we hear there is wheezing this can be the beginning of pneumonia. The Guinea Pigs seem to have a predispostion to this problem when they get sick. It may be bacterial or viral. I suggest seeing a Vet with cavy experience as they may need to administer some antibiotics that are cavy safe. If you scroll to the botton it explains about this: http://www.animalhospitals-usa.com/small-pets/guinea-pigs/guinea-pig-diseases/guinea-pig-diseasesgeneral.html
Right now I suggest keeping your baby comfortable by taking her into the bathroom to inhale some steam. You can open a jar of Vicks Vapor rub in the room to help relax the breathing. I have a link below to see if it helps locate a Cavy Savy Vet. Joan