I think it's perfectly normal to feel terrified, teary, avoiding people and being unable to sleep. So is being calm, calculated and thinking you are in control. How we react to this assault on our life is highly individual.
I also lost my sister to breast cancer.
On my father's side I lost an Aunt to breast cancer and many others to ovarian cancer. The same week of diagnosis my sister in law was dying from endometrial cancer. I was at her funeral and still waiting on my results. All these experiences impacted me greatly and made it difficult for me to "just be positive". But that's okay. We don't have to be positive, we just have to show up and have the sugery and treatment for our best chances. And slowly slowly we start feeling as a SURVIVOR.
Have you been referred for genetic testing?. It won't change your current treatment plan but it may impact on what you should do in the future. Make sure you have a referral to a genetic specialist. Whilst mine was negative (huge relief) it was valuable to map our family and as new genes emerge they will recheck our dna. We were delighted not to have inherited my Father's family BRAC1 faulty gene. None of my siblings have. Apparently at this stage it's just bad luck.
Kath x