2003 BMW 325 fuel

My car gas line was on the red line. I went to the gas station and filled the car up completely. I drove from the gas station to the store which is in the same parking lot. Went inside for groceries about 1-2 hours. I put my groceries in my car and then attempted to start the car. The car cranked but would not turn over. It was as if gas was not reaching. I pressed the gas peddle but nothing. All the lights were working fine. The oil is fine. But the car would not start up. It wanted to start but just didn't. I went back in the store and bought some Lucas and it did nothing. I thought maybe it was a fuse but am not aware which fuse it is. Can you please help me?