Alright if you won't go to the doctor then at least change what you use to treat it. I don't know much about chamois butter but it sounds like it is not an anti-biotic. As soon as you can, tonight even, go to your nearest 24 hour pharmacy and buy a product called Bag Balm. I kid you not the stuff is great when it comes to saddle sores. Plus it has anti-biotic properties in it. It'll heal you up in no time, meaning the sore will go away. You can also use Bag Balm for more then just saddle sores, it'll treat the sores caused by athletes foot, abrasions, road rash, etc, which means you can use Bag Balm for open wounds that are on the surface of the skin or superficial. Oh and toss the chamois butter, it sounds like it's not worth a hill of beans.