malteserzz - I'm so sorry - it is an awful shock to get this diagnosis, and you will be absolutely reeling for a while. Try not to go into panic mode - I know it is very hard, and you are feeling, frightened and bewildered, but honestly once the news has sunk in a little bit and you are able to talk to your surgeon/oncologist and know your treatment plan, it starts to feel a bit more manageable, it really does sweetheart.
Your life is not over, this is a treatable disease, and there are many treatment options, and the treatments are more and more tailored to individual cancers to give you the best possible chance.
The DX is a big trauma, but getting the diagnosis is the first step on the road to treatment and recovery, and although cancer treatment always seems scary - it is doable and manageable, a step at a time.
Do you have a breast care nurse? - they are very good people to talk to and go over your fears and any queries you might have, Macmillan also have good help lines if you just needed someone to talk to.
We are all here to support you as best we can, we can answer questions about treatment, hold your hand, and offer a safe place to vent, shout, cry, yell and swear - whatever you need. xx
And as an afterthought - if you think you might need a bit of help sleeping or staying calm over the next few days, ask your GP - they will always give you something to help - even if just for a couple of days.