@loula; @miriam57- The main concern about getting the vaccine is not whether it’s safe for people with cancer, but about how effective it will be, especially in people with weakened immune systems. Some cancer treatments like chemotherapy (chemo), radiation, stem cell or bone marrow transplant, or immunotherapy can affect the immune system, which might make the vaccine less effective.
Cancer patients were not part of the covid-19 vaccine trials.

Although there isn't specific information yet on how effective the vaccines might be in people being treated for cancer, it’s possible that the vaccines might not be as effective in people with weakened immune systems as compared to people with healthy immune systems. Despite this, exp

For patients who have just had a stem cell transplant or received CAR T-cell therapy, who are typically receiving immunosuppressive therapy, we recommend that they delay COVID-19 vaccination until at least 3 months after they’ve completed treatment. That’s based on data that [other] vaccines have had limited efficacy during periods when these patients are their most immunosuppressed.

The data are a little less clear for patients who are getting aggressive chemotherapy, but for those who are receiving more intensive treatment regimens—for example, those starting initial therapy for leukemia—we recommend that they delay vaccination until their cell counts recover.
https://www.youtube.com/watch?v=aqip68uI6S8&ab_channel=MDAndersonCancerCenter
I hope that both of you have discussed your vaccination delay with your oncologist. Have you? WHat did they say?