My guniea pig cries when he is excited or nervous... You baby is new so she just need time to adjust... When mine cries I give him veggies.... Guniea pigs do squeal a lot
chech out this page... It shows u what they sound like when the squeal...
if your pig sounds as if shes in pain, call the vet but remember the do talk a lot

http://www.angelfire.com/mn/pugget/gp.html