A couple years ago I fell off a ladder and broke my leg.
Thing was, I went a few days without knowing. I didn't cry when it happened, just was like, "this hurts, dude." So the ER people said I probably just sprained it. They didn't even look at the x-rays, and sent them to an ortho to be reviewed for any tissue damage.
Few days later, I get a call and they're like "Your leg is broken and the tendons are torn." And I was like, "Explains why I can't walk, hurrdurr."
And then I had a cast for half a year and had to relearn to walk. Great stuff.