Hi,
It may be because of she is about to reach at menopause.Possibility of Hormonal imbalance and fibroid must be ruled out.
Next Steps
consult a good gynaecologist and go through complete work up. You can get Hormonal test n UsG lower abdomen to detect the abnormality.
Health Tips
Don't take diet which is spicy n sour in nature. you can take Durva leaves juice to reduce blood flow during menses.