I Just Wanna Stay a Kid

So yesterday, the sophmores took the P-SAT's and it actually got me thinking... what am I going to do after I get out of high school? I'm not even sure I have the right skills to do what I actually want to do... plus, I'm not even sure what I intend to do with my life. My grades are not the best at the moment, but I actually want to do something with myself. I want to go to college and I want to further my educational background. I think I want to major in a social science like sociology or a psychologist. I would love to be a doctor but I can't stand the sight of blood and, let's face it, too much work. I'm going on my thirs year of high school and the years are just flying past me. College is going to be here sooner than I expect and I should start thinking about my future plans. Am I the only one who is scared and over-thinking this situation?