Pale stools usually means that the stool is a result of a Digestive process that did not include bile (bile pigments give stool its unique look)
Absence of ile pigment might be simply due to 'intestinal hurry' which is from the diarrhea.
So the major problem is the diarrhea which could just be a viral enteritis (since baby is not ill)
The prudent advise is to still get the baby physically evaluated by a pediatrician.
meanwhile in addition to milk restrictiomn, give the baby a rehydrating fluid (OTC in pharmacies) 4 ozs after each bowel motion and 4 ozs every 3 hours otherwise TILL she is examined by a doctor