Why is it so hard?

Hey ya'll, i'm trying to narrow down my choices so that i can focus on one major. That's Hard! I've been thinking a lot about what i want my goal to be and I can't come to one decision! I want to open my own day care center/pre-school, i want to be a pre-school teacher, i want to be a pediatrician, i want to be a child phsychiatrist, and i want to be a marketing manager! That's a few too many do you think? Why does picking one career have to be so hard? Am I alone in this battle? LET ME KNOW!