Metastatic breast cancer

Hi I've just been for results of a PET scan which has shown my cancer can no longer be cured only treated as I have a nodule around my heart and one in my lung as well as the original tumour.   I'm going to be having Abraxane weekly chemotherapy and Pembrolizumab immunotherapy every 6 weeks,  I'm struggling with the question is this it for the rest of my life? Will I never not be having treatment,  is anyone else in the same position?