Me, being me, said to him, "Don't you need to at least touch it to see if there's a big cancer mass back there?"
"Well," he said. "If it was a tumor you'd probably have other symptoms such as loss of bowel control. So while I can't say you don't have one, we should try things like physical therapy first."
I found that to be a very amusing answer. So while I'm not convinced that 2 months from now I won't go back to a new doctor and have him or her say "What a shame you didn't come to me when you first started having pain. You have back cancer and two days to live. But if you came to me right away I could have saved you."
In the meantime, it's off to find a good physical therapist. Blah.