2002 Jeep Laredo Blew another Fuel Pump

I have a 2002 jeep grand cherokee special edition with just over 105000 miles on it. 3 days ago I had a new fuel pump put in it, after being told mine was the reasin for having really hard starts. I pick the vechile up and it starts like its brand new. I drive less than 200 miles and while driving all of a sudden I am losing power. My rpms are dropping down to 500. I pull the vechile over and turn it off and turn it back on, it starts right up again. I drive for a few more minutes and again start losing power. Pull over again and rev the engine while in park and the rpms go up to normal. I countine to do this till i finally get home. Did the fuel pump fail again? And if so why? Or is it something else like the regulator??