I have.

I never studied to be a vet, but I wanted to be one. Then I realized I'd have to see the sick and injured animals, among other things. I knew I couldn't handle that.

But I have studied early childhood education and communications (separate times). Now I'm working as a social media coordinator, which is somewhat what I was studying for last (this spring) because I wanted to work in that field.

It's normal to change your mind about what you want to do with your life.