Hi there,
I was stage 2 not 3 but have read lots of stories on here.
My cancer was lobular which is not the main one ( that is ductal).
My understanding is that you will get your full pathology results after the mastectomy.
For example there may be other treatment after chemo such as hormone tablets if it is ER positive or herceptin if it is HER2.
There is a lot of info on this website , I am still discovering stuff.
I found particularly helpful the podcasts by Dr Charlotte Tottman who was a psychologist specialising in treating cancer related distress who got breast cancer herself.
Because as well as the physical impact of a breast cancer diagnosis there is the emotional and psychological impact.
Anyway I’m sure others will jump on here to share with you but in the meantime know that on this forum you will get plenty of support from others who have “ been there”.
Take care.