my baby is 4months 27 days old. she is having small reddish spot under the tongue and we consult doctor he gave candid mouth gel. after one use mouth become fully reddish. next day we consult another pediatric doctor and he said it is oral thrush and gave candid mouth paint we used one week. but no improve in her mouth. she refused to feed what should do is oral thrash leads to reddish cheek and tongue how long it takes to cure