I am so sorry to hear this. Welcome to the club that nobody wants to join. I presume that you meant that your cancer is grade 2? Staging isn't done unil after surgery. It is so difficult to take everything in along with the shock of a positive diagnosis.
HER 2 is a protein which stimulates the growth of cancer. About 1 in 5 breast cancers have a higher than normal level of HER2 on the cell surface. If your cancer is HER2 positive you will usually be advised to have chemo and a drug or drugs known as targeted therapies. If you are diagnosed as HER2 negative, then targeted therapies given to HER2 positive breast cancer will not be of any benefit.
Triple negative breast cancer occurs when breast cancer tests negative for progesterone, oestrogen and HER2 receptors. This means that targeted therapy and hormone therapy drugs will not be of any benefit. Triple negative cancer can be treated by surgery, radiotherapy, chemotherapy (either before or after surgery) and sometimes bisphosphonates. About 15% of people with invasive breast cancer have triple negative breast cancer. (Breast Care Cancer UK).
Next time you see your surgeon ask him about this. Did you take someone with you to your appointment? It is always a good idea to do this, particularly if you expect to get any test results. It can also be helpul to write down a list of any questions you have.
I expect that you will feel anxious about your treatment but relieved to at last have a diagnosis and happier now that you are moving forward with treatment. There were certainly times when I felt frightened and nervous and was an absolute mess. I have had 10 years to come to terms with this and, still have darker days, but it is so much easier to deal with when one has a more positive viewpoint.
Please keep in touch and let us know how you are getting on. Remember that we are always here for you.