Hi, so sorry to hear you have been diagnosed with breast cancer. It is a lot to take in all at once and you will find things will progress very quickly now - just go with it and let the doctors take care of you. There is no point wondering and stressing just now what your outcome will be - believe you will get through this major hurdle in your life, be positive and strong and once they get that sentinel node result you will have a better idea of what your treament will be.
I am on the other side of the journey you are about to undertake - next month it is 5 years since I was diagnosed and even though I already believe I am cured will be able to officially say I am :) I had a grade 3 Invasive ductal carcinoma - I had three surgeries but still have my breast. 30 radiations, and now 5 years of medication.
This journey is not all bad - you will find wonderful support from many different places, you will find an inner strength you don't know you have, you will find out your most caring friends and family and the people who can't cope with you being sick. If you are having chemo can I recommend you get your wig organised as soon as you can as that was the one thing that really was awful - losing my long hair - if I ever have this happen again and I am touching wood as I say this I will have my head shaved and wear the wig straight away as it is quite awful when your hair comes away - you think it isn't going to happen then it comes off in chunks - not so good. A silk bandanna is good for wearing around the house and you can wear that with a baseball cap or hat to have a swim and people hardly notice.
I found that if you are open it seems to make people more comfortable to ask you how you are. I also found I had to be the strong one - my husband fell apart but was and is wonderful to me all throughout.
Good luck to you - I so hope all goes well for you, another pink sister.
Debbie x