Hi GC003ā I hope you are doing ok.
I had a similar scenario but mine was invasive ductal carcinoma. I had one positive lymph node, taken at the same time as the first lumpectomy, followed by a second lumpectomy which still didn't get margins and then a mastectomy (thankfully with margins and no chest wall involvement). The tumour ended up being much larger than originally thought. No evidence of disease elsewhere in the body from the PET scan.
I ended up having chemo and radiation, but I got the impression that it wasn't an entirely straightfoward decision/recommendation for the team, and I don't think my disease fit neatly into a stage - although they ended up calling it stage 2.
When it came to chemo, the team was going to offer me a lesser regime, but given my age (young-ish at 46 and otherwise fit and well) and my desire to throw everything at it, I ended up getting the full chemo experience. Not exactly a picnic but I'm glad I had it. I think it would weigh on my mind if I knew there was an option for more extensive treatment and I didn't take it. But everyone is different and has different medical needs and priorities (medical or otherwise).
Let us know how the decision goes and how you're travelling. Best wishes - the waiting is the worst part if you ask me.