Will Using Aquaphor Treat Rashes And Red Bumps In Vagina?

My toddler developed red bumps in her vaginal area last Wednesday. I first noticed them after her bath. The next morning, the skin around them was also red. I use cloth diapers, and I was using aquaphor but the rash has spread a little. For the last two days we have been using desatin, but that has not helped either. She is not in pain either when it is wiped or in the bath. We have not started a new soap, but we did give her olives a couple hours before they developed. We did start giving her peanut butter about a week before this started. Can you help me?