New to all this

Hi BamboozledMe and a very warm welcome to the forum. Sorry you find yourself here but it’s a great place for support and shared experiences. Your case sounds similar to mine - diagnosed at 59, er positive, HER negative, lump a bit bigger at 13mm. Re lumpectomy v mastectomy…. So I am also small breasted as a B cup but mastectomy was never offered or discussed until after my lumpectomy when the oncologist was recommending radiotherapy. He said that lumpectomy plus radiotherapy would give same predicted outcome as mastectomy (without rads). When I asked if I could have had a mastectomy and therefore avoid rads, he said that it would be regarded as over treatment in my case. And it was too late anyway as I’d already had surgery! I’d say it’s worth discussing at the stage you’re at. I never thought of it at your stage, too shell shocked I think to query anything! In the end my treatment was exactly what you’ve mentioned above - wide local excision/ lumpectomy, radiotherapy and now on fourth year of Anastrozole, one of the hormone tablets commonly given to post menopausal women. 
Wishing you well and sending a big virtual hug your way. Keep posting, ask questions and let us know how you’re getting on. Love and hugs, HFxx 

Thank you Happy feet. I will discuss the options before having the procedure! xx