My Ultrasound Mammogram Revealed A Complex Cyst Or Solid Mass

My ultrasound mammogram revealed a complex cyst or solid mass measuring 4 x 2 x 3 mm in right breast at 9 o clock loctaed 3cms from the nipple and also there is one more irregular mildly vascular complex cyst measuring 7 x 2 x 7mm in the left breast upper outer quadrant at 2 O clock located 3 centimeters from the nipple. they are asking me to go for biopsy. I am 39 years old and no family history of breast cancer. I am concerned.