Breast Cancer Recurrence

It has been two and a half years since I was first diagnosed with er+ pr+ her2- breast cancer in my right breast. Most of my treatment was well over. I was still on hormonal treatment, including my monthly zolodex injections and tamoxifen tablets daily. I was stage 2b with my first diagnosis and the chances of recurrence were supposed to be slim. I was still on three monthly visits with my medical oncologist and surgeon. My life was beginning to feel almost normal again. I had just started to relax. I stopped fearing, everyday, that every ache in my body was cancer. After two and a half years I was finally feeling calm again.
My G.P(general practitioner) suggested that I have a mammogram and ultrasound as he didn't have any records on file since September last year. He figured I was due and should have the left breast checked as well because "sometimes cancer can return in the opposite breast". Now, I owe my doctor a second time as the mammogram picked up a cancerous lump in my left breast.Again, I thank my doctor for being so thorough as he has probably saved my life for a second time.
Two weeks ago I had a lumpectomy on my left breast and lymph node removal with all clear margins. This time I won't be having chemotherapy but I will have radiation therapy again, starting in a few weeks.

Recurrence

How do you react when Breast Cancer returns?
How are you expected to react when Breast Cancer returns?
Shock?
Scared?
Do you just go through the stages as you did the first time?
Do you react differently this time?
You know what you are in for this time, so is it easier?

Feel free to answer these questions and any others you can think of. I will have my answers tomorrow. I was rediagnosed just a couple of weeks ago.