You feel like crap, because she did nothing to bring this on. Her family did everything right, and you still couldn't save her. And the next job was probably to an addict or drunk whose 'friend' hung up on the dispatcher and gave the wrong address, and you found him anyway, and he lived depite what might have been mortal stupidity. But being smart and good is no protection from death, at any age, in any circumstance. We grieve the loss of those who still had so much life to give, and who will be grieved by those they love. You have every right to feel awful. I'm sorry.