Hi @Bowie - there is nothing that anybody can say or do that will help erase your shock, pain, confusion, anxiety & fears.
The only thing that is normal about a bc diagnosis is that there is no normal at all - what & how you are feeling is perfectly ok for you. Sure, you may not feel OK and feel as though you can't cope & don't have the strength.
Try not to think about tomorrow, next week, next month.
The best piece of advice that I was given was to breathe - long, deep breaths. At least 10 of them.
I found myself doing this after diagnosis; before surgery; before scans. I still do it now - at night; walking along a corridor at work.
Bowie we are not warriors - I can assure you. Like your Mum I have had a bc diagnosis 3 times and it shakes you to the core each and every time. It does not get any easier.
In some respects it is out of our control but you can gain some control back by speaking about it - you said you did not develop a good rapport with your breast care nurse. Perhaps you can ring BCNA on 1800 500 258 and ask to have some telephone counselling.
I did and found that it made a difference and I was recommended to contact and speak with a psycho-oncologist (somebody who specifically deals with patients or loved ones who have been diagnosed with cancer). I had about 6 one-on-one sessions. You may be able to get information through the Cancer Care Centre where you are having your treatment.
Also I found to ask lots of questions whenever I had an appointment. Before each appointment I would write down a list of questions. I would only google certain sites - this site and Cancer Council.
My very best wishes to you & virtual hug for tomorrow.
Sheryl <3