hi, my daughter is 2 1/2 months old and has thrush in her mouth i was given something for it (cant remember the name of it) but it made her really ill so i went back to the doctors n they gave me daktarin oral gel but it said on it not to give to babys under 4 months old, i spoke to a nurse about it n she said its fine for her to use it, is this right? or should i go to the doctor again and get something else?