Breast cancer mets to lungs and brain. Feeling hopeless.

I was diagnosed in 2020 with a small but very aggressive breast cancer with high oncotype score. Had a lumpectomy and radiotherapy - lymph node was said to be clear yet 7 months later it had spread to 3 nodes. Had axillary clearance which landed me in the hospital with sepsis. Decided I was too unwell for chemo following the sepsis. Recently had a CT scan showing mets to both lungs and brain. Has anyone had any positive results from chemo or alternative treatment? Or a combination of both? I am only 44 years old. I need to be here for my kids. Many thanks