I know it’s easier to say than do, but don’t stress it.

I’m in my late 20s, and it took me until a couple years ago to stop stressing this sort of stuff.

Best thing you can do is keep your head down, stay quiet, and start looking for a different job.

Your supervisor sounds like a tool who wants to flex his power some, judging by how he jumped straight to a write up. Those kinds of situations will only get worse.

I will offer a word of advice though: Sometimes things aren’t going to be fair, and you may get stuck on a station at work a couple times before rotating. Unless it becomes a constant issue, just roll with it and document it.

It could have simply been a mistake, and your (self-admitted) anger at the end when asked to do something simple could have been taken poorly and as an initial refusal, whether it was or not.

I’ve found that just smiling, saying yes, and looking for a new job when shit starts to stink has been the best way to go.