Hi, According to your history the possible causes of your irregular periods are: -After removal of ovary sometimes it may take sometime for regularization of the menstrual cycles -Also stress and strain of surgery by altering hormonal levels can affect the menstrual cycles -Sometimes bleeding can be seen during the time of ovulation -Doing minimal physical work may not be responsible for bleeding as you have not undergone uterine manipulation. The measures that can possibly help you are: - Usually in endometriosis post operative medical treatment is recommended to treat any minor unnoticed bits or to prevent recurrence. This will be either combined hormonal pills or progesterone supplements usually - These can help to regularize the menstrual cycles also. After discussing these things with your doctor you can plan the management. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Sree Gouri S. R., OBGYN