What is My Calling?

I'm almost 23 years old, but until now I still don't know what I really want to be in life. I still haven't figured out what is my calling. I felt so left behind, and it's one of the not very nice feelings in the world.

When I was younger, I have thought of many things of what I would be when I grow up. At first I wanted to become a teacher, then another year passed and I wanted to be a lawyer, then another year passed, I wanted to be a chef, and then another and another and another. It seems like every year, my desires of what to become is changing.