Diaper rash won’t go away. Help !

Johnson

My daughter is 8 months old and she has had this diaper rash for over 5 months. I kid you not, I have used over 10- 15 different creams, I’ve lost count. When we went to the doctor for her six month check up he told us to use Cortizone. Well that made it worse. I also tried using a yeast cream and that did nothing either. So I usually just use coconut oil and it seems to kind of help but it definitely doesn’t help it go away.I try to let her air out as much as possible and I use wipes that are sensitive. It’s not a horrible rash but it is definitely red around her butt. She doesn’t act like it hurts her but I just wanted to go away already. Anyone experienced this before? I don’t know what to do anymore