You havent typed in any question so there is nothing to answer but I can make some comments on what you have written.
1. If you have had 3 babies and are only 35 years old, you do not likely have polycystic ovarian disease, especially as there were no findings on ultrasound exam.
2. You may have heavy bleeding that the birth control pill will control well.
3. Endometriosis runs in families. If your sister had it, you are at risk of about 50%. The pill will decrease your risk of developing it and of needing surgery.