Advice on Prosigna

Thanks for replies, I have IDC, stage 1 , grade 2, HER2 negative, Oestrogen positive (2+ 90%) and Progesterone (1+ 10%) positive. They removed 2 lymph nodes and no cancer in either. I understand the reason for the oncologist suggesting chemo is due to the HER2 result and that they did not get the cm clearance around the tumour, in fact in a large area only got a mm clearance.
really wanting to know others experiences in having had the test and their decision based on the results and now later, would they have done it differently. I feel I am too emotional at the moment to make good sound decisions.
thanks Roslyn