Belle: I'd say it's a good sign that she was willing to contact you and admit that she had doubts.

Medicine is not easy to do and I am much more wary of people who assume they know it all than those who are willing to really investigate before trying anything. I think that doctors do a lot of damage by trying to act sure and not explaining the full situation to their patients. They need more time than they're given and that's what always makes me uncomfortable, it'd be great to find someone who would actually care enough to follow up.

You mentioned science. Science is not about certainty, it is actually about always changing as you receive new information. It's about gathering all the evidence first before deciding what you're confident about, then changing your ideas if they don't fit what you observe.