For every one person misdiagnosed there are probably 10 that think they have cancer because of webMD. People are dumb, and I bet every anecdote you have about how your doctor was wrong they have 50 about patients who refused to do basic treatment courses that would radically improve their lives. But it's ultimately true: you have to be somewhat knowledgeable and responsible for your own health. Always get a second opinion if you're unsure. But this know it all syndrome also applies to you. Just because you can "do your own research" on google doesn't mean you know it all either.

Even so doctors are extremely overworked now and insurance companies don't want to pay their fees. So now they're running from patient to patient, unable to even pay attention to them. That's even if you get a doctor now before the multiple nurse practitioners or physician's assistants who also don't know anything.