Yogurt for yeast diaper rash

P

I am desperate. I have been to the pediatrician three times already. The first time they gave her a fungal cream, the next time they said go with out a diaper, the last time they said butt paste. She is 9 weeks old and has had this rash for 6 weeks. We switched diapers, wipes, have gone with out diapers. Has any one ever used yogurt and had it work?