Hi, sorry you are going through all this and you are young. I had grade 3 and hormone positive bc and no lymph. I had surgery, chemo and radium. I know chemo is tough but grade 3 ca is the highest grade and there are greater risks of return. In saying that there was no lymph. My oncologist recommendation my treatment plan ie chemo and radium and now tamoxifen to give me the best chance possible that this horrible disease won't come back. My oncologist is a professor and very learned. I was really happy to follow her advice and undertake my entire treatment plan. She had studied for years about all of this and she knew alot more than me.
I did question all of it and the benefit of each treatment. They all do something different and each treatment targets a different layer in the body. My tamoxifen is for 5 yrs and is actually 60% of my treatment plan. Maybe ask your oncologist to break down the treatment plan into percentages to see the benefit of each. Good luck with your decision.