It's very rare to have everything under control. So when you feel like an unexpected event throws the rest of your life out of whack, get used to it. It happens to all of us. But instead of getting upset that you couldn't prevent a friend's illness or because you found out that your so-called sweetie's a louse, learn to accept it. Assess what the news means for you. Then figure out how to counteract the negative, and encourage the positive implications for you.
Want more encouragement? Then think no further than Bette Reese's words, "If you think you're too small to be effective, you have never been in bed with a mosquito."