03 renault scenic 1.9 dci intermittent loss of power?

changed the fuel filter about a week ago, car ran ok after change. filled up with fuel 2 days ago, 10 miles after filling up i experienced sudden loss of power, revs would not build up + car would not climb incline. pulled over, out of gear, revved engine and it seemed to clear. car drove normally until today when it happened again 3 times. help please !