I was diagnosed having two different sorts of cancer lumps almost a year ago now. One was ER & HER2 + (triple positive) and the other was TNBC (triple negative) I was Stage 2 Grade 3 just like you. I was petrified like you in the beginning but I've come through a lumpectomy, 6 months of chemo, a double mastectomy and immediate reconstruction and various other health scares along the way. I am amazed at how quickly this year has gone and I am now other the worst. Don't put too much emphasis on grades and stages. These are really for the medical profession to figure out where you sit and what treatment you are given. TNBC responds very well to chemotherapy and is certainly not a death sentence.
Mandy we all feel hopeless and scared to death at first with any type of BC. This is why we say take it "one day at a time". It's no use jumping ahead to a future none of us have any idea of. Try and focus on the here and now. You will have a plan of action soon and then you will be amazed at how things will settle into a sort of pattern. If chemo is part of that plan, then see it as the army that attack the little buggers and kill them. It will be rough, I won't gloss that over, but you will get through. You will find your inner strength to cope with what is ahead. I also recommend you call the cancer help line and talk with them. They are very helpful in easing your troubled mind. Stress and worry are very natural and you'll have your ups and downs. There is also a support group here for TNBC, here is the link
http://www.bcna.org.au/group/16948. I think you'll find a lot of support there.
The most important thing to remember is that you are not alone. Your family and friends will be there for you and we Pink Sisters are here as well to listen and give you love and understanding. We hold your hand. You can do this.
Lots of hugs to you Mandy.
Love Janey xxx