A friend of mine had back pain 3 years ago that wouldn't go away. His doctor didn't think it was anything critical. One weekend night the pain returned and my friend went to the ER. That decision saved his life. The ER physician was suspicious and did more tests than my pal's doctor had done, and discovered that my friend had a cancerous kidney. His was confined to one kidney too and he is the picture of health today. In fact I saw him last week. He is cancer-free. He also has a new personal physician.
I am praying that things continue to go well, and that you both will be able to spend the holiday season at home.