Who to ask about pathology details?

Hi all, just new here…yay🎉?! 🤦🏻‍♀️

I see everyone seems to know what hormone, stage and other details of their cancer. I know the size of mine, that it is invasive lobular. Just wondering, as I’d like to find out further details and I guess just assumed someone would “tell me” when I needed to know. 
Would my surgeon or GP be the person to ask for those details?

I’ve had a lumpectomy, several lymph nodes removed and need to have further margins or areas of margin removed. I’d like to know obviously if the cancer is potentially fast growing, stage and hormones. 
thanks so much.