Suggest Treatment For Bleeding After Periods

In march 2009 first time I faced problem with my period. After 5 days period cycle again it was started bleeding from 10th days. I was prescribed to take femilon for 6 months, and then again next 5 months. But the problem still exists so again I was prescribed to take femilon for 3 months. Now after having familon for 3 months I have stopped taking it from this month. But this month again I have bleeding from 8th days of my period. I dont want to continue my rest of the life with medicine. Can you please suggest what is my problem and what should I do.