Hi Jodie,
My doctor is the same. Mine is 6cm also and I want it gone, they want it gone and as you say it's all happening so fast that we don't have time to think or comprehend. I also won't be having reconstruction surgery straight away. I'm not that concerned about having to wear a prosthesis even for 6 to 12 months. I think I'm a little past low cut evening gowns and boob tubes hehehe (I'm 53).
Is your cancer aggressive? Mine is becoming nagging, a constant feeling of tired muscles and a tired arm. I've had a fine needle biopsy of a suspicious lymph gland but it was benign. Lets hope that the rest of them are the same. Yours as well.
Cas