I'm 45 and I can't decide what I want to be when I grow up . . .

I think I am having a midlife crisis. The fact that I never pursued a college degree, and never chose a “career,” is weighing heavily on my mind. I don’t think I can handle it anymore! The problem is that I am so interested in so many different things: anthropology, English, genealogy, medicine, and education, just to name a few. How do I choose? I don’t want to be the only one in my family tree who turns out to be a “nobody,” and that’s where I am headed. I have an AA degree but being bad in Math and Chemistry is holding me back.