Genomic Testing?

I had my radiation oncology appointment today and my dilemma is the other way around. Whether to have genetic testing to see if I DO need chemo. At this stythey are saying just radiotherapy.  I am not funded for genetic testing but my surgeon and the radiation oncologist said it is up to me to be tested for it as I am ‘borderline’ as to whether they would recommend I have it. I have a sister who had cancer at 41 and breast cancer on my Fathers side also. The only issue is is that it will delay my radiation treatment, although it will already be delayed by 2.5 weeks due to Christmas. I would be put on hormone treatment in the meantime until the results come back in. They said I would be closely monitored so that any return of the cancer would be picked up early. My concern is that the close follow up is only for the first 5yrs to return to normal screening, but I am only 49. I feel maybe it’s a long time not to know if I have the opportunity now. But then do I want to know?? 

The decision has been left up to me, but I am far from knowing what to do!

any thoughts or input would be appreciated. 
M 😊