Hi, The waiting is totally the hardest part, but once you have the information it will really help your team to come up with the best treatment.
I had a double Mastectomy some months ago followed by radio, but in my case the Ki67 indicated that chemo would have minimal impact for me, my cancer was more hormone responsive.
I had only the sentinel node impacted - hoping it's the same for you, but radio was offered based on the 2014 European study showing an improved outcome for BC in cases with just 1 -3 nodes. http://www.medscape.com/viewarticle/822213
This tells me your team are offering you the best and most current treatment available. Take hope from that !
Good luck with everything