Does Grade 3 tumour always mean chemo?

Just wondering if anyone knows if the initial pathology test result change after the surgery. My initial pathology test based on the biopsy had all information on status of hormones, KI67 and Her2. After lumpectomy (unfortunately waiting for the second surgery as the margins were not clear) my surgeon did not want to discuss the pathology test after the lumpectomy although I have requested a copy. I have not seen the oncologist yet but my surgeon told me that the treatment would include chemo and radiation to prevent the cancer coming back. Probably the only option is to take one step at a time.