I have a solid m in my that's microlobulated oval elongated Bi-Rads 4. Is it cancer?

Confirmed by mammogram and U/S. Externally Isoechoic in heterogeneously dense . It has partially defined/obsured microlobulated margins. Internal echostructure is geneous and hypoechoic relative to adipose tissue. It's 9mm and in the anterior region of the right at 12 0'clock position. I had a hysterectomy at age 25. My mother had ovarian cancer at age 26. I also have been tested for the "cancer gene" and do have it. I am 33 years old with 4 children. Have had a 15 pound weight loss this month (135 down to 120). I have had vague symptoms of cancer for 3 years now and have been treated for fibromyalgia and chronic fatigue syndrome for years. Can all of these things still add up to be nothing? HELP!!!!!