Has your memory been affected post treatment?

Hi Bowie. 2015 really isn't a long time ago. My breast care nurse said being diagnosed with breast cancer is like being in a horrendous car crash. The trauma and rehabilitation will take time. I was diagnosed at the same time as you though I didn't have chemo. I had a lumpectomy and radiation. At first I was prescribed tamoxifen and I found that made my thoughts quite muddled and sometimes I would forget words. I was then changed to Arimidex ,(post menopausal),and mentally I'm me again. Maybe talk to your oncologist. I found stress and exhaustion made my memory nonexistent. 
Be kind to yourself , I get the impression your new collegues don't know what you have and are going through? Maybe they will be more supportive than you think. Just a thought. 
All the best. Xxo Janine