My pediatric career died fast in med school.
That rotation, during my 3rd year, was 8 weeks long. It took me 15 minutes to realize I didn't want to do this for a living. So I was left with 7 weeks, 6 days, 23 hours, and 45 minutes of waiting it out (and pretending to have a deep interest in hearing about the color of a child's diarrhea/mucus/whatever).
1. I can't see a tympanic membrane in a baby's ear canal (and am convinced most pediatricians just confabulate the "it's a little red" line).
2. I remember trying to examine a hysterically screaming infant in pediatric clinic. It was screaming before I went, in, and me trying to listen with a stethoscope only made things worse (and damaged my hearing).
Finally the mother said "FOR GOD'S SAKE! MAKE HIM STOP CRYING!!!"
So I left the room. That seemed to do the trick.
And that was how I realized I had absolutely no interest in doing peds.