Hello @LynJoan, sorry to hear your diagnosis but welcome. You will find a lot of information and support here.
I had a left nipple sparing mastectomy (with immediate silicone implant) last August, 13mm stage 1, grade 1 IDC. Clear lymph nodes so no chemo or radiation.
I also worried about cancer in the other breast so I had an MRI on both breasts before I saw my surgeon. It was for 2 reasons. To check that I only had the one cancer in my left breast but also to see whether the other one had any "unstable" tissue. Fortunately my other side was healthy and my surgeon said without any family history I have the same chance as the average women in getting cancer in my healthy breast. Actually now that I am taking Arimidex that decreases my chances even further.
That decision was fine for me but in the end you just need to do what will let you sleep at night.
Your medical team will help you with your decision and as the other ladies have said, go with your gut feeling. Wishing you all the best with your decision LynJoan. Jane xx