My wife just went through a double mastectomy. Luckily the mammogram caught things very early , but she was having none of the half measures stuff and was telling each doc along the way it was time to convert to bolt on breasts.
The first diagnoses was a punch to the gut and mind. What helped as learning as much about what she had and how far it had gone and what could be done. You make a plan and you march through every door. You don't wait long for each doc office to make your next referral appointment, you call ahead and do it for them, if you haven't heard in a few days. The biggest thing was finding the BEST hospital / treatment center you can find. We went to City of Hope in Duarte California. I highly recommend them, now. Places the specialize in cancer know what to do and how to treat their patients.
Since about 2016, there has been an explosion of immunotherapy drugs to get your body to fight the cancer. In Australia, they just announced a quick blood test to detect cancer at 95% reliable rate. The point is, every day, new stuff is coming out to find and fight cancer. Be your own advocate. If you don't like one doc, find another.
Time to play the Rocky theme and get on it.