When I was in college (shortly before you actually), I had a "Summer of 'Yes'" where I forced myself to say "yes" to any experience that wouldn't put me in physical or legal danger. That provided all sorts of unexpected and often interesting situations and learning opportunities that I wouldn't have otherwise had—at least at that point in my life.
The summer turned into a year and, looking back on it, is probably responsible for where I am at professionally and personally.
Finally, to echo somewhat of what Michelle wrote, Steve Jobs once said "You can't connect the dots looking forward; you can only connect them looking backwards. So you have to trust that the dots will somehow connect in your future. You have to trust in something - your gut, destiny, life, karma, whatever. This approach has never let me down, and it has made all the difference in my life."
My advice to you is to do something. Anything. Worry less about the specific direction forward and work on simply moving forward. Force yourself to have a Week (or month or year) of 'Yes' to get into new experiences—it will be everything but boring.