Women with more severe cases of prolonged and continuous periods may want to consider pharmaceutical options. In cases of hormonal imbalance, most doctors prescribe oral contraception or any hormonal therapy to regulate the menstrual cycle and balance your hormone levels.
The bone that you sit on is also known as the sits bones. The  scientific name is the ischium which is a large swelling  posteriorly on the superior ramus of the ischium.
When a person is in a seated position, his or her weight typically rests on a section of bone called the ischial tuberosity. There are two of these bony swellings, sometimes called the sitting bones, located at the front of the superior ramus of the ischium, which is the lower back portion of the hip bone.