The Dr. Prescribed Estradiol 2 Mg. 1xday. I Had My

the dr. prescribed Estradiol 2 mg. 1xday. I had my ovaries removed 3 weeks ago and have felt very depressed since then....however, my mother and my aunt had breast cancer. My mother died 3 yrs ago from it. My aunt has survived it for 25 yrs with no problem. Is it safe for me to take this drug? I feel better with it, but am wondering about my family history. My dr. said it should be. I would appreciate your opinion. Thanks.