I have been away so just catching up on things. Sorry to hear you have been unwell. I often think of you and your "alien" as you call it.
I am triple negative and so no Femera or tamoxifen for me. However I have struggled with the weight gain from chemo induced menopause. I also have many aches and pains in my joints. I try and just suck it up as they say (hard at times) and make sure I walk as much and as often as I can. My lovely husband bought me a "Fitbit" for Christmas and so it really helps motivate me to do 10000 steps every day. It also measures what would be equivalent to climbing flights of stairs so I go looking for hills to walk up.
I also try the no sugar, no processed food and am right into vegie juicing. Unfortunately just old fashioned eat less move more. Wish there was a quick fix!!!
Hugs to you.
Paula :)