Hi There,
thank you for the complete history. It sounds like you are having a perfect evaluation. The biopsy of the lining of the uterus is important. It most likely will be normal but it is important to check because about 5 percent of all women with a cancer of the uterine lining (endometrial cancer) are younger than age 40 and 25 percent of endometrial cancers occur in premenopausal women. Therefore any abnormal bleeding need to be evaluated by a biopsy.
However, the most common reason for abnormal bleeding is an imbalance of the ovarian hormones, estrogen and progesterone. This is called DUB (dysfunctional uterine bleeding) and is treated by birth control pills, progesterone alone, and sometimes metformin. Metformin is a diabetes drug but some hormonal imbalances are due to a complicated condition called PCOS (polycystic ovarian syndrome)which may have an underlying association with insulin resistance.
Sometimes a well placed fibroid can distort the uterine cavity and cause heavy bleeding. I do not think there is presently any evidence to suggest that your symptoms are from a growth or tumor in your ovaries.
best wishes to you