Doctors are like car mechanics, some are quite good at diagnostics, and some are not so good.

Plus, some symptoms can have many causes. There is a saying, "If you hear hoofbeats, expect horses." ... ... ... ... But sometimes it might be zebras.

Sadly, once a misdiagnosis is on your record, it's there forever.

Another thing to remember, when reading so-called doctor articles in print and on the web, many are written with a preconceived agenda in mind. Some even quite false for profit.

I tend to put more weight into the peer-reviewed papers on NIH's PubMed site. Not to say they are absolute truth, but at least reviewed by other people in the same field before accepted and published.