I totally empathize with you. As you, I'm in my early twenties too, and I do get lost at times. The bitter part of my life is that I've made  tons of mistakes in my past. There was a time when I used to contemplate on those mistakes on daily basis. But, that have changed today. I've learned to let go things, and focus on my today. In my opinion, to be motivated in life, you need to know the power of "now". NOW, TODAY, THIS MOMENT  .....is  very vital. Just remember that your future is determined by your actions today.

P.S. personally, what I believe is; the only certainty in life is the uncertainty. You can never be sure abt. your future, so what I suggest is try and make your present day a productive day.