fuel pump

Has anyone experienced low fuel pressure after topping off the tanks in PA-28-140? My aircraft generally sits at 5-6 PSI on the fuel pressure. After topping of the tanks I have often seen the pressure gauge read 1-2 PSI. Turning on the electric pump will cause it to rise to normal levels. I have...

So I did my first solo in the PA28R and I accidentally left the fuel pump on for about ten minutes. Now I know that I'm the first person who's ever done this, but how long is an auxiliary fuel pump rated to operate over the course of it's life span? How much damage did I do to the aux pump? Not...