this happened to me this month also. This is my third cycle of ortho tri cyclen (well actually i am on tri sprintec the generic) anyway i started spottin gon the sunday of my third week and i continued to spot until the following saturday of my 4th week, so two whole weeks!! i called my doctor and she said not to worry as this happens sometimes just to keep an eye on it next month. how many months have you been on ortho?