I have a ground level cistern catching rainwater with a shallow well pump inside to pump the water to the toilets in my house. The pressure on the pump is set to about 37psi. After flushing the toilet the pump turns on for 5-10 seconds. A few minutes later it will turn on for another 5-10 seconds. This may happen as much as five times. Whenever the pump turns on it sound like it's straining. I presume it needs repair and thought there might be some folks on this forum that could diagnose it. I've attached a video so you can hear the noise it makes.

Thank you!