Survivor since 2010
Your oncologist is not being aggressive -- he/she is being thorough. There is no follow up treatment after surgery, radiation and chemo if you have triple negative breast cancer. Medications like tamoxifen and Arimidex and herceptin don't affect triple negative; therefore your oncologist is wise to suggest chemo because there is a very small chance the cancer may have already spread beyond the breast and the chemo should work to kill any of those before they get a chance to set up shop somewhere else in your body. A mastectomy is a wise move also, but it can't always prevent a recurrence by itself.