Before I attacking your bosses that don't want you to rest and have peace of mind, let me commend your last image, you look so cool and it's giving that genZ vibes. Well, she's GenZ.
I can tell how tough teaching is because I have also taught people before even in the university level. I took tutorials for the level below me, trying to act like a good senior.
You are a strong lady and I am proud of you for that, your job isn't too flexible and if any one give you extra work again, tell me. I will take it from there, they should not stress my baby for me.