Elective double mastectomy

Got a breast cancer diagnosis a few weeks ago. One breast involved and one lymph node. Some family history of breast and ovarian cancer but not enough to be put forward for genetic screening. My gut is telling me I need and want a double mastectomy. Medical are dead set on a lumpectomy. Fighting them on this is actually causing more stress than anything. I've read all the papers about lumpectomy + rads having similar outcomes. But my gut is still screaming at me that it won't be enough in my case. Did anyone here get a double mastectomy under similar circumstance and if so where did you get it done?