Liver cancer and bone cancer

I was diagnosed with breast cancer 3 1/2 years ago and I had a mastectomy. Now I find out I have 3 lesions on my liver and a couple of places in my bones. My oncologist is quickly jumping for me to have chemotherapy again. The first time I went through chemotherapy it was a nightmare. I stayed in bed for a year!! I was so sick and I wanted to die. I was even looking for ways to end my life because the suffering was too much.
I want to try other options and I’m curious if this has worked for anyone.
I want to do RAF and take the Keytruda for a year. I can’t see what it would hurt? She also told me there wasn’t a cure for me but I could be treated.
Has anyone ever had cyberknife to remove the lesions and take an immunotherapy pill?
And if so what was the outcome. And has anyone lived past the 5 year mark? Thank you so much for taking the time to read this.
Gina