Newly diagnosed at age 34

Wow, that is a big decision to have to make.  I was 39 when diagnosed with 3 tumors (biggest one 3cm) hormone positive, Her2 negative.  No family history but my onc kept saying that with diagnosis at such a young age, they always recommend gene testing.  I had a mastectomy cause two lymph nodes were involved.  Turned out I was BRCA2 positive so decided to have a prophylactic hysterectomy and mastectomy of remaining breast.  I can never tell you what to do, but you are young and you want the best possible chance of survival. In my case If I wasn't offered a mastectomy I would have demanded one because I didn't ever want to have to deal with bc again ever and being so young with such an aggresive cancer as mine, I just wanted to my 120% sure I was doing everything possible to add to my chance of survival.  All the best with your treatment and the decision you make.  We are all here to support you as best we can x