Had mastectomy july last. Now Dr tells me to remove ovary and uterus.

Aashikmeeran, it's not unusual for women whose breast cancers are Estrogen Receptor positive to consider having ovaries removed to reduce the amount of estrogen in their bodies that might feed a cancer recurrence.  There are also medicines that can shut down the ovaries.  You don't mention the cause of your excessive bleeding or your age.  It seems to me that you need to ask the doctor some more questions.  is he or she afraid that the bleeding is caused by ovarian or uterine cancer?  Have tests been done to check that theory out?  What are the risks and benefits of the surgery?  If you are hoping to get pregnant or if you are years away from menopause, you will want to have especially good evidence that you need this operation.  Even if you are older, a hysterectomy is major surgery, and you will want to balance that against the excessive bleeding you are having.  This surgery might reduce your cancer risk and solve your bleeding problem, so consider it with an open mind, but be sure you understand how it will help you before you decide to do it.