Should I have chemotherapy?

I think I was in a similar situation to you. Grade 3.   No Lymph  involvment and no spread.  My tumor score was just over the limit for NOT needing chemo.. I also have another health condition which made the oncologist a bit 'cautious' about chemo, but it was all very patient centred and finally the decision was mine, supported by the oncologist, not to have chemo partly because there was a new drug on the horizon.. Anyway, I was prescribed anastrazole and zolandronic acid which I have tolderated well. At the time of making decision not to have chemo I was told there was a new drug about to be licensed for use in a more peventative way, but not a lot more info. I should have persisted and questioned more but I was still in a way processing the diagnosis and surgery and not in the best place to make difficult decisions. I just wanted to feel well again. The new drug turns out to be ribociclib which has just been licensed in the UK for use for primary breast cancer, to be taken for 3 years with similar side effects to chemo (not sure its on NHS yet).  I am now being encouraged to take it.  If I had known everything I know now (almost a year after my mastectomy) at the time, I would have had chemo  - it would have been 12 months or so from treatment to full recovery. There was a slight risk, but at any sign of a problem they would have simply stopped chemo. I am now faced with 3 years of chemo like symptoms - hair loss, fatigue and a weakend immune system.  This is just my experience and feelings at my age and life circumstances. What you decide has to be right for you, at your age, your family circumstances, lifestyle etc. etc. Just keep asking questions. Take care and I wish you every bit of good luck there is