Unfortunately I had a ligament tear in my knee and after 4 surgeries I developed some pretty bad pains.
I took a vacation and scheduled visits to 10 orthopedic surgeons who had some of the highest medical credentials in the country.
Everyone told me that pain was caused by a different thing and dismissed ideas of other doctors.
The confidence with which they told me the reason would have convinced me have I not visited other doctors.
Later I had similar experience with doctors from other health areas.
Essentially, in medicine they can only diagnose the most typical stuff, for anything else it's just a bunch of wild guesses.