Waiting for lumpectomy

I am due to have a lumpectomy in 11 days for stage 3 invasive Ductal carcinoma , I have been told I’ll need radiotherapy after but nothing as yet has been said about chemo, we have been given limited information If i will need it or not, and I am wondering if anyone else has been in this situation. The waiting for the surgery to happen is long and scary and even though I have a really supportive Partner he’s been there every step of the way though me having a heart attack 16 months ago to now being diagnosed with BC I do feel quite lonely and confused about what to expect. Any advice would be greatly appreciated.