@poodlejules I think what's valid is your own personal diagnosis, as you are a combination of Her2+ and ER+, they said the ER was only a small %? so seems your Specialists are being thorough and yet maybe not totally necessary. I was on Tamoxifen for 4yrs and had zero side effects honestly, different story at 2nd diagnosis, once treatment throws you into menopause and the combination is a little tough, for me with Arimidex and now Aromasin Im just stiff and sore but once I get moving am fine.
There has been a study too that came out not that long ago stating that Tamoxifen doesn't work in 1/3 of cases, it's learned to adapt uuugh! hence why I had a recurrence, it doesnt work for everyone.
It's very individual, do what feels right for you. Big Hugs xoxoxo Melinda