Could The Prolonged Bleeding Be Due To Regrowth Of Polyp?

Hi, i am 58, got a uterus polyp removal in the month of Nov'10,drop blood flow was there occasionally (4-5 days in a month) for few month. but from the month of feb'11 bleeding is there for 7 days and the volume of blood flow is more than drops, but occasionally in a day , i already got tested the polyp and the result was benign.......kindly suggest.
AGE 58
GENDER FEMALE
TREATMENT UTERUS POLYP REMOVAL IN THE MONTH OF NOV 10
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