Metastatic breast c, Chemo and immunotherapy anyone?

Hi

As I go into my 5th year of treatment for mbc (3rd line of treatment), metastised to right lung , I will shortly start a new treatment of chemo and immunotherapy. My cancer which started as hr + her-, is now showing positivity for triple negative disease also (with pdl expression >10, so a canditate for immuno). Would love to hear from others on this treatment and how they have coped with it? Many thanks K