If the doctor hadn't been so sure of his diagnosis, this would have been caught years earlier. I'd specifically asked, more than once, about the possibility.
A lot of scrambling on their part, that day, to get me a same-day appointment for consult with a well-regarded surgeon.
the UK has had a campaign recently around sepsis where people are being trained to ask these questions.
I have a lot of medical knowledge and I try not to be a wise ass with my doctors. Sometimes though, it pays to pay attention.
Yes doctor, no doctor, I don't think so doctor, yes doctor also my left foot. => He thinks I have a sprained ankle, I think I'm not sleeping well (or whatever) and I'll mention what my guess is at the end (not before) and ask him why my guess is (presumably) wrong.
Of course if you think there's something unusual or your symptoms are severe then of course go to the doctor without delay, but it's also helpful to get a bit of a personal education when you've got time with a specialist.
There's a fairly big camp of people both online and in real life that is strongly against questioning medical authority. I've encountered it before.
For example (and I know this is purely anecdotal), after doing a few hours of extensive research and photography comparisons online I came to the conclusion that my sister had shingles. I mentioned this to the doctor when I took her and he dismissed it and said that it is unlikely since she is so old. I mentioned this on a subreddit that I frequent and a bunch of people jumped on me and told me to stop doing my own research and to let medical authorities do their job without me pestering them. However, after taking her to a different doctor, he immediately recognized it as shingles and prescribed her the appropriate medicine.
On the one hand, I get why doctors don't want the "ignorant masses" doing their own research and coming op with cockamamie theories, but on the other hand, doctors can only hold so much information in their heads whereas the internet has vastly more information available and I can become an expert in one tiny little niche fairly quickly.