IF YOUR DREAMS DON'T SCARE YOU THEY AREN'T BIG ENOGH

Well, I don't know what I want in my future and what I do in this moment. so far what I have done is to choose an baccalaureate,but I have not consciously chosen, I have done basically discarded, because I have no idea what I want to be in the future. 
The truth is that I am quite worried about that, and then if I want to study a career and the baccalaureate I have done is useless? what I'm gone do..
Everyone tells me I still have a lot of time, but a bad decision now, you may prejudice your future.
So what can I do??, I find it very unfair that force us to choose now, every day change of opinion on I want to be,i 'm not sure of anything , because every time I take a decision I'm afraid of making mistakes. 
So I made a desicion, for now I'll concentrate on pass 4ESO, and have a lot of fun this summer.