@TKS Oh dear, I didn't realise you had a cruise coming up in 2 weeks. You must remember that biopsies paint only part of the picture. Until you are cut open sizing and staging are estimations only. I'm wondering what scans you have had.
Mine was 10cms spread across 2 tumours in my right breast (AA cup) but unlike yours which is invasive lobular, mine was invasive ductal, locally advanced. Have you had an MRI, PET scan or CT scan?
When I heard the word 'invasive' I was in a big dam hurry to get things started.
That's the thing about breast cancer. It happens when you least expect it.
I'm so sorry that it happened to you and I know that others will pipe in with much better advice than me.
Good luck to you. xo