D.D.
I would think that it would be good for her to keep her hydrated..are you using electrolytes? the plain pedialyte is way better than the gross flavored ones..bleh! i tasted those..the antibodies in your milk should help her out..maybe take it slow but keep her hydrated so i say yes.
good luck..i remember how scared i would get when my son was an infant and getting sick..i would take her to the doc tomorrow if she's not better and keep a close watch on her..perhaps lay her on her side ..not good if she's on her back and vomits..she could choke
xo
D.