Mine was her2+. I went thru the same steps you described. Chemo, surgery, radiation and chemo. The initial chemo killed all the cancer in the breast. It did shrink the ones in the lymph nodes. Since there was still positive residual, I’m doing kadcyla to kill anything that would have went outside of the lymph nodes. Had the initial chemo killed everything, the plan was to give me 6 treatments of immunotherapy. Wishing you the best. It’s a tough journey but I found out once I trusted my medical team and was comfortable with the treatment plan, I am more sane.