Does the pump run or start running? What type of a pump, how deep is the well and what was the flow rate?
Sounds like the well has ran dry (or water level too low for the pump) and needs time to recover. How much flow was it producing normally? If it already was in single gallons per minute to begin with, you will need to turn the pump off (30 minutes or more if needed) and let the water fill the well.
If your pump has a controller with a dry well probe, you don't really have to do anything, it will turn the pump off and restart itself when the water level is high enough again.