You are only 20 and yet, you have been pushed towards so many different things. I remember myself when I was your age. Shit, I was studying two different programs and not because I was smart as fuck (ok, I am smart but that really isn't a point here), but because I was completely clueless. Clueless about what I wanna do once I really grow up. Yep, you've read that right! I wasn't even close to full frown up person, that came maybe even 10 years later and thats fine. All I'm trying to say is; you don't have to figure out your entire life at the age of 20. Its perfectly ok not to know what you wanna do for at least couple of years more. Most importantly, don't let anybody convince you the time to choose is now or even better, now or never.
Its more important that you get to know yourself. Once you do that, it'll be much easier to make big decisions and chances are, those decisions will be the right ones.