Scared & feeling down

I try to take one day at a time and not think ahead, I'm usually a positive person or talk myself into being positve. My breast cancer was caught early. I've had a lumpectomy in my right breast my tumor was 11mm, surrounding tissue was clear, and 1 sentinel node removed which was clear, so my oncologist decided that I have chemo as a safe guard just in case there were microscopic cancer cells that couldn't be detected and also because of the triple negetive cancer diagnoses. I also have to have 6 weeks of radiation after I finish chemo. As for deciding whether I should have a masectomy, I am getting my results for my genetic test next week and my breast surgeon said that if it came back positive he will recommend I have a double masectomy ( I hope I'm not positive for it). In this case I will definitely have it done. I still am thinking of having the masectomy even if I'm not positve mainly because 2 years ago I had a scare in my left breast. I know that if it does come back I'll regret not doing it. I'm hoping I will have my mind made up before I see the my breast surgeon next week after I get my results from genetic. Thank you for your reply. Big hugs xxx Johjoh