I am in the same situation and am going to push for the bilateral. This is my second bout in the same breast and so far it has not gone to the left but did have a positive biopsy on a left lymph node. My mental health is just as their opinion to just treat the cancer. I am more than my cancer and my mental health will not go easily through this if it comes back a third time. My peace of mind is part of my whole being as well. I finished 12 rounds of chemo and am now waiting to hear from the surgeon.