5+ year survivor stories needed

my mom was diagnosed with dcis in jan 2019. In surgery, they found a tumor under the dcis that biopsy didn’t pick up. 2.6cm TN and 1 node. So after lumpectomy she had an MRI and found a 0.5 er+ tumor as well. She is in treatment right now, AC x4 every other week and weekly taxol x12. Opting in for a mastectomy after treatment. She is doing super well on treatment, minimal SEs. I’m scared since she isn’t havung SEs chemo isnt working. Survivor stories for TNBC please! I think about this day in and out.