As a child, did the daughter lose an adult to illness/death? My mom died when I was 15, and I went to the doctor many times since then, worried about some unidentifiable illness (TSS for some reason was one that worried me often). I still "plan for" accidental death more than my husband or friends think is normal (for example, always have life insurance policies, in case of emergency cards, written instructions to friends, instructions for future owners of my pets, etc). My therapist said it is very common to think the way I do for people who lost a parent when they were children.

Just a thought.