This is a difficult decision and I am sure some of our users will be offering their support and advice soon.
You may also want to look at and post in a Just Diagnosed thread that you can find here. This has a lot of activity and is very supportive. We also have a surgery board which has lots of advice on mastectomy's.
In the meantime you can always call our helpline at 0808 800 6000 who will be able to talk to you about the decision and offer a friendly ear.
Digital Community Assistant