First of all, start parking in different parking lots!
Take off the rear seat and make sure the electrical connector to the fuel pump is secure. Maybe getting bumped just jostled the connector loose? If the connector is secure, I'd still check it with a voltmeter to make sure power is running to the connector. Again, jostling the car could have loosened an electrical connection somewhere else.
If it's getting power and the pump isn't humming when you turn the key to "on", then the pump is dead. Could be sheer coincidence that it died after the car got bumped. How many miles? The fuel pumps seem to be on-schedule to die around 130-140k.