Being transgender is a constant and persistent condition. Even for genderfluid people the “fluidity” needs to be repeatable. If a girl/woman suffering from cramps during her period thinks “I wish I was a boy/man so that I didn’t need to suffer through this every month”, she doesn’t become trans because of it.

And “gender confusion” isn’t a fair description. It’s basically saying “they are wrong about what they’re feeling”. And you’re not a telepath to know that