Breast cancer diagnosis destroys my life

Hi my name is Valentina, last year I been diagnosed with breast cancer stage 3, I had mastectomy, chemotherapy ( was terrible) naw I am in the middle of radiotherapy, I have injections in my ovaries every month, I take tablet every day and I need to start infusion in bones and one more tablet. Since last year is terrible mentally and physically but worst of all my son see and feel everything with me he is only 6 years old once I saw him wash the cereal bowl before go to school and I said why? His answer was mummy I want to help you because you are I’ll . I started to cry and I cry every night because I want to see him grow up and I am scared I don’t have the chance. I love to treat my son with a nice holiday this year, and I want to do bones scans and organs scan I need to check if the cancer is coming up somewhere else, the doctor said I will have only the mammogram on what is left,under the nhs the rest I need to go private . Now if anyone can help me to leave my son with good memory , and have some medical check I will say forever thank with all my heart