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