The complete answer is both "yes," and "no."
If I'm understanding you correctly, picking an area to study as your major for college only determines and affects your first job or two after college. It's definitely not crucial right now. I'd suggest getting an Associates Degree in General Studies or equivalent. Basically, this degree means you did a little bit of everything; English, mathematics, sciences, history, PE, etc. So, you definitely have time. I didn't nail down a specific major until I was 24, for example, but I had that Associates degree, which meant I looked good to a lot of employers and a variety of schools.
And to continue with the job thing, think about this, I'm getting a degree in history; most historians go work for Microsoft/Apple/IBM/Other computer companies. What does a history degree offer a computer company? I have no idea. Really. If you got a degree in physics, for example, you could end up almost any where. What I've noticed though, is you actually have to work really hard to STAY in physics, or history, or whatever your degree is.
tl:dr Your degree provides an angle to get your foot in the door. Your specific field of study allows you to say, "I'm good at this one aspect of the job you need a person for, so hire me." After that, it depends just on what you want to do with your life.