You can't tell if it has spread from a biopsy. The first thing they do to check that is have a look at your lymph nodes. I had a sentinel node biopsy where they injected some dye into my nipple and then traced it to see which lymph node it got to first. This was then removed at the same time as my tumour and biopsied then.
I went from my diagnosis to my GP to get a referral to a breast surgeon. It was with him that I discussed all my treatment options at that point. After my operations, he referred me to an oncologist.
I hope this helps. Treating breast cancer is a well oiled machine in Australia, and broadly speaking we get excellent care be it public or private. Make sure you like and trust your team, and trust your gut. Breathe. Hang in there. K