That is a pretty specific ask, let me break it down into pieces. Every cancer is different and every woman is different and cancer gets discovered at different stages. It sounds like maybe this is your specific cancer. This had to be a great stressor to you.
I did have a similar cancer er+ Her2+, on the chest wall. It was not metastatic at that time, but being on the chest wall it was a difficult cancer.
Since your question seems pretty specific, can I ask what kinds of questions you are trying to get answered? Has your doctor talked to you about a plan yet? I did notice you also asked a question about a clinical trial in another question, is that an option for you?