I'm hearing pretty clear to listen to my body and not expect too much after surgery and to walk but not over do it. Yes, I know the feeling after a walk making me feel great until later and then I am scratching my head on how I set something off. Looks like you kept a diary of your physical progress to figure patterns out. I'm going to do the same thing and then talk with the surgeon if I have shoulder issues. When I had a mastectomy on one side only, that arm took a long time to raise comfortably reaching for a cup in a cabinet. This surgery will be on the left side under the mastectomy area so I hope my arm doesn't blow up with swelling after being insulted again. I never got lymphedema except a tiny bit. I always sleep with that arm raised on a pillow above my heart. I have a friend who had surgery four years ago with the open method that was a rough so she slept upright in a Lazy Boy for four months until she could lie down again. I suspect I will be sleeping upright in the hospital and on my Lazy Boy initially. I'm a stomach sleeper but I suspect that will go out the window so I don't compress my lungs. Trial and error. Thank you for highlighting some of the issues. I should be able to push through it. And knowing I am not alone does help on this website.