My boss randomly told me “by the way, you're scheduled for every day you're off this week and off every day you are scheduled” (I have 3 days off a week, because school) because a coworker took the week off.
He didn't ask me. When I told him I couldn't he said “you'd better give me an actual reason” and told me that schedule changes are just life and that school and existing plans come second.
I'm literally losing money because I am off clock the moment I'm unneeded and the days I don't work are all slow.
I don't know what I do. I really don't want to get fired, but I literally had 0 notice. He told me this just as I was exiting the building. What do I even do here?