The pump must be primed, not a well. You remove the plug etc. on the outlet of the pump and pour water in until it overflows, then cap and start and vent air out the cap until gone and tighten it. Without priming it, you will burn it up. And you can't tell that you did because it sounds 'normal'.
Or you could have a blocked jet i the pump or if a two line deep well jet pump, then in the j-body in the well. Or you used too much water and the pump sucked air and needs to be primed or the pump is worn out; meaning the impeller.