If the pump runs, but you have no flow, then it would be sucking air BIG TIME! But those lines just don't simply pull out by themselves...
If the pump was running, you could trace down it's location by following the noise. So it sounds like the pump isn't running. Check voltage on the back side of the switch in the on position. Determine voltage or no voltage. Should you have voltage, and the breaker doesn't trip, sounds like a stuck float in the pressure switch on the bottom side of the pump motor housing.
Now it's just a matter of finding the pump!!