Hallow Dear,
Though I do not know your age which is very important in figuring out the differential diagnosis, form your family history, I guess you would be 30 + years of age.
The first condition I would think of is
Fibroid in the uterus; however, this would cause pain in abdomen with heavy bleeding. Secondly, it could be
Hormonal imbalance leading to such heavy bleeding; it could even be
Polycystic Ovarian Syndrome (PCOS). Cancer of the endometrium also has to be considered. At this age
Thyroid dysfunction also is common cause of heavy
menstruation. And lastly I would like to rule out any infection of the reproductory organs and/or tissues around them.
Clinical internal examination should be carried out initially to look for Pelvic inflammation. Then get
ultrasonography which will inform us regarding the rest of the condition. Blood examination is mandatory since you are bleeding so heavily over a period of 12 days. Hormonal profile would look for hormonal imbalance.
To control the bleeding immediately, you have to take some
Progesterone, Oestrogen preparation. Please start iron preparation with high proteins immediately to support the blood loss.
If there are tumours, you may have to undergo surgical intervention while hormonal imbalance may be treated by relevant hormonal treatment.
Please report to your Gynaecologist ASAP.
Dr. Nishikant Shrotri