starting after making a couple stops

After drivng my 95 Grand Am for about 25 min. and then stopping at a store for 1/2 hour I proceeded to go elsewhere and run in briefly. When I came out the car would not start. It did not make any noise at all, so I thought it was the battery.. After 2 days it started right up. It's obviously not the battery since it recharged itself. What else?

The first thing that comes to mind is the security system. Did the security light come on when it would not start. If it did that is you problem. If not the problem could have been with the battery connections, ignition switch or a host of other things. At this point it is really impossible to give you a true indication of what may have happened.