Australian Category 5 and measured at 7cm. Just wondering ???? Age 55

Hi there... I am in Australia and Iassume that your BIRAD 5 is the same thing as our Category 5 here in Australia.... within 2 hours they had me scanned, biopsied and wanting me within the next few days to have it removed.
It is 7cm , I have no idea if it is at a Stage Level..... but not looking good at that size I think. It is the same side I used to bleed out of a number of years ago. I have always had dense lumpy breast that always seem sore anyway but this was different, I didn't have to even push down on the skin to feel it.
For anyone reading this it is easier to feel if you lay back in a recliner (hahaha) and put your arm up over your head. Don't let people tell you that a lump is not painful because mine is when it is pushed on. They couldn't believe the size of it in such a short period of time as well. So fingers crossed I can beat this if it what it probably is, because I have little grandies I want to see grown up.
I always said the people I understand the most with depression would be a mum that has to say goodbye to their kids.....
I also have Lupus and Fibromyalgia, geez I don't want to have Immune Supressants again... the suck the bloody life out of you....... Give me strength for them ... cheers Leanne from Australia