I have a newer house with well and pressure tank. Was taking a shower when all of sudden no water. I checked the breaker and it was still on. Checked the breaker with D square next to the pressure tank and everything looked connected and no ants. The pressure tank seems to have no water in it. And pressure valve shows 0. There is a release valve near the pressure valve and when I open it water comes out easily. Any suggestions what problem could be?

Reset the main breaker. With no pressure you should hear the pump rumning. If not, you need to check Voltage to the pump and across the pump control. If everything checks out you probably have a bad pump, possibly a foot valve. Is this an above ground or submersible pump?