In the 800 metres at the 2001 World Championships in Athletics, Njie ran the slowest time in her heat and the fourth-slowest overall. She did improve at the 2003 World Championships, finishing over nine seconds slower than she had two years previous. At the 2004 Summer Olympics in Athens, Njie was again the only woman in the Gambian delegation. She was only invited to compete a month before the games were due to start, as another Gambian athlete, Mama Gassama, had been withdrawn. Njie placed last in her heat with a time of 2:10.02, more than ten seconds behind the heat winner, Maria Cioncan of Romania. However, she became the first Gambian woman to participate in three Olympic Games, with sprinter Jabou Jawo being the only other Gambian woman to have previously participated in multiple editions.