Diaper Rash?

Nikol
We have been struggling for A LONG time now to keep my daughters bum from getting red. There are small raised oval like dots that get REALLY dry. I want to say it's like eczema. We've tried anti fungal and hydrocortisone creams, all kinds of diaper rash creams.... NOTHING HELPS! Any ideas what this could be? I'm desperate! 
We don't even use wipes anymore bc we thought it was the wipes. I'm out of ideas guys. Help!