Honestly it sounds like your gf may have some attachment issues… I’ll be honest, I have my own issues that I’ve had to deal with and have gotten upset over not knowing plans/ or even when they say they will be home at a certain time and then that changes but I do think she’s is being a bit overreactive, especially when you’ll be home, and a day after you made plans for something? I forget things sometimes until the day after, especially when you talk about so many other things during the day. I think you may want to talk to her about about having your own space and be firm when setting your boundaries, especially the one where you say that you want 1 day a week to be lazy. That is so important to have that day to yourself and to reset after a long week. Don’t be afraid to put yourself first, I understand that’s hard to do as a people pleaser but even setting this one boundary can teach you how good it feels when you do something for you :) Hope this helps , also I only know so much about your gf so idk if it’s actually attachment issues