My sister had breast cancer in both breast am i a high risk for breast cancer?

Higher than average: Any othet family members, including extended family, with breast, ovarian, uterine, prostate, kidney, pancreatc cancers? Considergenetic testing.

Yes: Women with close relatives with breast cancer are at increased risk of breast cancer themselves.

High risk clinic: it is important that your sister get evaluated for the BRCA gene. I highly recommend that you find a high risk breast clinic at your local breast center to get evaluated for your race which may also include genetic testing.