Waiting to have biopsies on Friday

Hello,

I recently turned 40 and went for a screening mammogram and ultrasound at the suggestion of my ob/gyn. I received a call from the breast center the morning after my appointment saying I needed to come back for more images. I wasn't too worried because I have a history of breast cysts and lumpy tissue. After returning and completing the diagnostic mammogram and ultrasound, the radiologist told me I have 3 masses that need to be biopsied, 2 on the right side and 1 on the left. I made an appointment for this Friday for 3 core needle biopsies and I am very nervous. I had 2 biopsies in my 20s that turned out to be fibroadenomas, so I am hoping that these will be the same. I guess what concerns me is that they found 3 separate growths. Here is the report.

The breasts are extremely dense, which lowers the sensitivity of mammography.

Mammo: There is grouped calcifications in the superior aspects of both breasts. Short interval follow up recommended.

Ultrasound:

Right breast:

At 12:00 N6 there is a heterogenous mass measuring 1.6 x 1.2 x 0.7 cm. Ultrasound guided biopsy recommended

At 10-11 o'clock N 6-7 there is a round heterogenous mass measuring 0.9 x 0.9 x 0.5 cm. Ultrasound guided biopsy recommended

Left breast:

At 2:00 N1 there is a round hypo echoic mass measuring 0.8 x 0.8 x 0.5 cm. Ultrasound guided biopsy recommended

Bi-Rads Category 4: Suspicious

How common is it for women to get breast biopsies? Is it unusual for someone to have 5 different biopsies by the age of 40? I have no family history of breast cancer except for my mom's first cousin, but that seems a bit distant and I doubt it is relevant.

I tried to research a bit online and I read that Bi-Rads 4 could be anywhere between 2-94% indicative of malignancy, which seems like an insanely wide range to me, so I have no sense of what to expect. Is anyone familiar with this type of terminology? Googling just made me anxious so I decided to join this forum instead.

Thank you for listening!