Grade 3 Breast Cancer Clear Lymph Nodes

Hi

Had my histology report back after my lumpectomy yesterday. It was a grade 3 with clear margins and no lymph node involvement! Phew! I'm waiting for an oncology appointment to give permission for tissue sample to be sent to the US to be tested to see if I'm high risk of recurrence. Has anyone else had this and can you tell me how long it takes for the results to come back. I'm 46 with a rare type of cancer that's normally seen in post menopausal women aged 60-80. Papillary Breast Carcinoma. 
Thank you

Jo xx