Told today mastectomy of my right breast

Ok so meet with dr tiver today for radiation consult and he said that I will only need 5 weeks of radiation, so score  not 6 -12 weeks. He also said that since they found minute cells in the first lymph node he was going to hit all the lymph nodes up to my collar bone just to be 100 sure . 
Just chemo to get thru now which starts next Thursday , so the rollercoaster starts