At age 17 and in Year 12, is it normal to still be indecisive about where you're heading after school?

I basically decided my third year in college. It helps being an American educated in an American university where that is easier to do. By the time I settled on history (in which I ultimately graduated), I had considered to varying degrees architecture, architectural history, art history, African-American studies, chemistry, economics, math, and statistics as possible majors. In short, I think its very natural that you haven't fully made up your mind. Also, you are interested in many different subjects which don't really fit together. So was I. What really matters is that you will find your right place, and that will happen. And if it doesn't, you simply go to graduate school in a different field than what you studied for your first degree...