A good chunk of what I do wasn't even a paid or recognized profession when I was a little kid. I'm a Lactation Consultant, Nurse and a Post Partum Doula. I did NOT want to be a nurse when I was a kid, I wanted to be something out of the ordinary for a woman. I avoided things like nursing work, office work like the plague when I was younger.
When I was very young, I wanted to be a "Mommy" and I am.
I also wanted to be an archeologist and/or and Egyptology. Last time I checked the want ads, there were few jobs available in those fields.
When I was a little older, I wanted to either be a writer or a journalist or go into law. I write, but don't know a whole lot about law. I'm glad I didn't go into journalism, as it's a dying field. I did have an advice column in the local newspapers from 8th grade until about half way through High School. Then I wanted a "real job" (not realizing the column was more interesting that "real work") and then, for a while really wanted to go into music and be in a band. That never panned out, but I sure as hell dressed like it for a long time.
In late High School and University, I was studying Psychology with a leaning towards Child Development, and in college was also Pre-Med. (Y'know medicine was something I could "fall back on" if the whole Rock Star thing never worked out. LOL!)
I ended up in the Health Care field by a slightly unusual route.
But, I'm doing exactly what I love to do.