When you feel aimless and lost, that is the path of self-discovery. Figure out what is right for you. The self-doubt and despair is all apart of becoming the person you were meant to be.
"We have two lives, and the second begins when we realize we only have one." - Confucius
Like my great teacher Mr. Weaver once said, "You can't eat an elephant in one bite, you have to cut it up into small bites." Same things applies to life. Put one foot in front of the other and be patient. Take the small steps to reach the larger ones.