Triple positive - HER2 - Newly diagnosed

I had similar and was supported by this support site, Mine was much smaller and I was also borderline, however I was encouraged to have the very best chance and have Herceptin, ( cost to hospital $60,00) with chemo to enhance its working and chemo (taxol) was not too bad. I have worked through and although tired, baldish, some days in bed by 7, not the worst thing and now starting radiation. I think you should give it the very best chance and not a huge problem, the staff were excellent and very supportive. 
It is the fear of the unknown that scares us! good luck and think carefully