Precognitive Dream? Coincidence?

November 4, 2005 started out as any other day. As night approached, I began to feel an unusual anxiety about the next day. That night I dreamt of my friend sobbing in front of an ambulance with flashing lights, but all I could hear was silence. When I woke the next morning, I had a terrible uneasy feeling about the events of the day ahead of me. None-the-less, I began that day as any other; got up, dressed myself and proceeded to work. The feeling only worsened as the day went on, until I was having such anxiety that I sat down and looked out the window, spoke with customers, anything to distract me from that torturous, relentless feeling of "something bad is about to happen." It was then that I heard my name being called over the loud speaker asking me to come to the service desk. Only I couldn't bring myself to do it. Shortly after an associate found me and said they needed me up front, that it was urgent. I picked up the phone, only to have my fears confirmed. My friend was dead. She shot herself after an argument with her boyfriend, who in return shot himself directly afterwards. She did not die immediately; she choked to death while my friend, same from my dream, was there and with the police and medical crew from the ambulance. Did I have a precognitive dream? The dream occurred about the actual time of death though so was that actually something else? What did I experience in that dream and why/how did I know something awful would happen?