The mid-life crisis is well known. I've even heard of people claiming to be going though quarter-life crises. I propose a renaming initiative. When one goes through these periods, it should be known as a Pre-life Crisis.
No matter when this "crisis" occurs, I believe that it is a realization that one's current life is not being lived for anything in particular. A realization that they are not experiencing life as it was intended. Therefore, by definition this crisis must be considered PRE-life.