I'm so sorry that you are feeling anxious about your situation but you are definitely not alone with that reaction. Many of us find it helpful to talk with others about what we are facing and feeling about it. Do you have a breast care nurse who you can talk to?
It is very sensible that your doctor is giving you more time to feel comfortable with your feelings about surgery. Remember that there are always choices and sometimes you need time to fully explore your options and feel more in control. Talkng to lots of people (on here, doctors and medical staff, family and friends) and reading other people's stories on here helped me to come to decisions that I was comfortable with for me.
Ask lots of questions (no one on here will think they are silly because most of us have probably asked them too at some stage). You are facing some pretty major changes to your body so take the time to feel ok (or as ok as possible, none of us really want any of this to be happening) about your choices.
Just to reassure you, I have now been living without my left breast for 16 months. I might do reconstruction in the future but for now I'm glad to have the cancer gone and I am enjoying life again and that is the main thing.
I'm glad that you have found this network and hope that it will help you as much as it has helped me. Take care. Deanne xxx