Waiting for results post op

Had a therapeutic mammoplasty 3 weeks ago and samples have been sent to USA for Oncotype DX . Have to wait a few weeks for results …. Chemo or radiotherapy?…… feeling nervous . 
Anyone else had this experience? 

Yes I was in the same situation this time last year. I had a grade 3 tumour picked up on routine mammogram. A sample was sent off for oncotype DX analysis fortunately I had a low score and only required radiotherapy and letrozole medication. I find it reassuring that my oncotype DX score was low as grade 3 is a more aggressive type of cancer and therefore more worrying.