Radiation after lumpectomy

HELP...I need some advice from you lovely ladies! I haven't posted for a while as I was between treatments. For those that don't know, I had a lumpectomy on 21 Dec. with no nodes removed. The surgery was very successful, with a 8.5mm cancer removed with clear margins. The surgeon said on my post-op appt that she thought i wouldn't even have to have radio but the medical team would discuss my case & come to a conclusion. Well, outcome was having me at 50/50 needing radio which brings me to now when I am meeting with a radiation oncologist tomorrow to discuss my 50/50! I HATE making decisions but I am sure he will tell me the pros & cons & then leave it to me to decide whether I want it or not. I reckon I have been extremely lucky so far with the "best cancer" removed successfully with a lumpectomy so now I need some word of advice before my meeting tomorrow on whether to risk not having it or playing it safe. i am 52 y.o. & the cancer was high nuclear grade & my mum dies of ovarian cancer when she was 46 y.o. Any words of advice would be great. I am not going to hold any of you accountable but just interested to hear the thoughts of you wonderful ladies that have been through it all. Thanks! xx