What type pump do you have, jet or submersible? If submersible is it a constant pressure type?
If you know, what is the hp and gom?
If a submersible, is it 2 or 3 wire, 3 wire has a control box between the pressure switch and the pump.
What pressure range do you run the pump at? Normal is 30 on 50 off.
When the water stops, have you been using a lot of water for load after load of laundry or multiple showers etc.?