If this happens again, go straight to your Autozone, or Advance Auto (or similar) and they'll check your system (starter, bat, alt) for free. Takes them only a few minutes. They also have a "starter pack" in case you shut your car off and it don't wanna start. It's the best "nothing" you'll spend, for peace of mind.
Meanwhile, Adam, don't be feeling me!
Kelli, there is only one Larry III. But there's Randy i (me) and Randy ii (svxeno). Glad I could clear that up.