What's it like choosing fourth line treatment for HER2+ breast cancer?

I have HER2-positive, hormone receptor-positive metastatic breast cancer and I'm looking at fourth line treatment options. My doctor explained that these advanced treatments combine chemotherapy with HER2-targeted medicines. There are two main approaches - one that includes bone therapy with medicines like denosumab or zoledronic acid to help protect bones, and another that focuses only on treating the cancer cells directly. My doctor will help decide which approach fits my situation based on whether I have bone metastases and my overall health. I'd love to connect with others who have been through similar treatment decisions. • What was your experience with fourth line treatments for HER2-positive breast cancer? • If you used bone therapy as part of your treatment, what was that like day to day?