I pretty severely injured an ankle back in September, at MMA, and for the first time in my life (at 38) it doesn't seem to be healing up very well. I keep finding new little movements that cause it to feel pretty wrong ("popping", "pulling", cold sensation, mild short-term pain, weakness).
One of these happened in front of my girlfriend, who ordered me to see a doctor, so I did. I filled out new copies of all the paperwork I filled out a year ago when I was grievously ill, sat around for a bit, got into the doctor's office, his assistant appeared and asked me a couple of questions, then the doctor appeared after a bit and asked me the same questions again. He palpated my ankle for a few seconds, told me to get a brace, and then left the room without another word.
Unless you're wealthy enough to afford a dedicated physician, there's just really no point in seeing a doctor for anything less than "I might be about to die".
...which sucks, because I'm a huge proponent of preventative medical care. It's just not available for most people.