Hi I would start by switching her to either cloth diapers or those pure and natural huggies ones or the earth's best brand or the 7th generation... you can ALWAYS find coupons online!! then another thing I would really suggest is Arbonne. I SWEAR by it ever since my daughter was born she had severe eczema and the doctor wanted to put her on steroid cream, she was 3 weeks old and I refused and Arbonne's products were the ONLY thing that helped, my son has similar diaper rash issues and I switch him to the pure and natural diapers ( at walmart and babies r us in larger sizes N-5) and I use either the night cream or rejuvenating cream and the diaper rash ointment, it works like a charm. it's heart breaking because it hurts him so much when he has the rashes. ok so Arbonne's products are pure safe and beneficial the do not use mineral oil or any petroleum products, fragrances or dyes etc. nothing that will hurt your little one or anyone for that matter. And the cloth diapers and or pure and natural huggies diapers do not contain harmful and harsh chemicals which cause allergic reactions. USE ONLY SENSITIVE wipes or get the babyganics wipes from babies r us they are expensive so I usually make my own at home using viva paper towels or unbleached paper towels and Arbonne products and a drop or two of tea tree oil VERY SIMPLE TO MAKE and I use the babyganics wipes from babies r us in the diaper bag.
check out my website I started to sell and tell everyone about Arbonne when it changed my little girl's life
www.shinewithnatalie.myarbonne.com
you can look at the products by clicking on the shop online button. the products are shown at full price and if you are interested I can sow you how to get killer discounts. and it would be less expensive than doctor bills and prescriptions that could take weeks and months to work...
google some info on chemicals in diapers and skin care products you'll see that it could be the culprit... I hope you get the help you need I feel for you, it was the worst feeling in the world to not be able to get help or help my little baby... but like I said there are lots of better options out there all you have to do is look.
If you decide to go with Arbonne or another safer brand of skincare products contact me and I can get you a recipe to make wipes at home it's worth it. in fact if you need anything or would like help I would be more than happy to lend a helping hand. just message me. :)
have a wonderful day and I wish you the best.
-N.