Sounds like "Bag Balm" (the Utter Cream). Personally, I like Aquaphor if you have to use over-the-counter balms. It's very expensive, but you can get a large jar of Target or CVS brand in the baby care section. I would think something by prescription would be better or used in combination with aquaphor.
Best of luck in getting through your treatments! You seem to have a good attitude and that can make a huge difference!
Kerri