Anything involving human contact has always given me extreme anxiety. Though many people see social anxiety as irrational, the fears associated with it seem very plausible. For example, it is likely that person x won't like me, or that I'll stumble over a word, or that I'll embarrass myself somehow.
Tests on the other hand never seemed like anything to get worked up over and consequently my sympathetic nervous system was never activated in a fit of panic at the thought of taking one. Something changed during my first LSAT (strike three coming in two weeks) and now I get worked up over every little test. Last night I couldn't fall asleep because I was worked up over a simple logic exam even though I know all the definitions, rules, and equivalencies by heart. Since I was sleep deprived before the test I took a couple of Modafinil tablets and drank a couple cups of coffee. I was awake all right and shaking like I was in a campaign commercial for Claire McCaskill.
Test anxiety sucks.