Butt rash on 2 week old

Angel • engaged💍👫 baby in heaven 👼 beautiful baby girl 5/8/2019 🤱👨‍👩‍👧 due July 2020🤰

How do I help her little butt rash I've switched wipes and diapers multiple times. I've tried different rash creams. Nothing is helping her pore butt. I'm calling her pediatrician today but any ideas from you guys is much appreciated.