Bad diaper rash

Help! What do you use for your baby to get rid of diaper rash? I've been using boudreaxs butt paste the red one but her diaper rash is getting worse! I thought maybe she was allergic to the wipes because I had started using new ones. So I switched. I switched diapers as well incase it was that. But it's all red and just looks like a rash! I tried coconut oil with lavender do! I will call pediatrician in morning. But anyone have any advice??