Open Question: I don't know what to do with my life!?

I'm a freshman in high school and I get really good grades. We've been doing a lot of career planning but I have no idea what I want to do. I go back and forth like every day between psychologist, orthodontist, biomedical researcher, homicide investigator, FBI agent, chiropractor, anesthesiologist, chef, etc., etc. The latest is that I want to join the military. I'm just running in circles and have no clue which direction to turn! It's really frustrating because I'm constantly being asked by my school what I'm going to do and I just don't have a clue. Most of the other students have been decided for years and they tell me to just follow my passions, but I'm so spread out. I love science, I love helping people, I love law, I love cooking; I just have too many interests. I know I want to follow a career that is going to pay well. I want to be able to provide a good life for my children, own a nice house/cars, travel, go to sports games, concerts, plays, etc. I want my job to be able to provide an extremely comfortable financial situation for myself and my family. I know I'm going to have to start applying for college in about a year or year and a half, but I have no clue which direction I want to turn. Any advice?