S.H.
Are you nursing/breastfeeding her?
IF so, and she has gotten Thrush... YOU need to get treated too. Your nipples. If not, the Thrush will not go away.
And it will continue to go back and forth between you and her.
WAS your daughter, actually treated for Thrush? Per the Pediatrician?
If not, it will recur.
Or, just put it in a bowl of rubbing alcohol for a bit.
Then completely rinse it off, well. Thoroughly.
If she drinks from bottles, you need to sterilize those too.
Thrush, is an oral yeast infection.
How is her bottoms? Does she have any yeast infections there?
If so, then you need to treat that too.
Either per a prescription ointment from the Ped., or over the counter yeast creams that have "Clotrimazole" in it. That is per our Pediatrician.