I, at times, have the same sentiments: "What am I doing with my life?" and feel as if I could have taken one of the various routes I had in mind when I graduated from high school. It isn't really regret as it is my being an impatient dreamer on my part. The remedy to this, for me, is to assess the skills that you have learned and possibly will learn and see where it can take you via google and find the things that you could find yourself enjoying.
That, and everything the person above me said.