There's a lot of history to 'okama', originally it was referring to effeminate men who were often (but iirc not always) prostitutes. It wasn't necessarily pejorative, more like a profession or a descriptor. Then you know time progressed, religious morality came in, and it became a Bad Thing, and a slur.

Nowadays there are people who have reclaimed it in the LGBT sphere, and it's usage in gay bars is similar to 'femme' (or maybe even 'twink'), but obviously that is not gonna be the case with a bunch of teenagers or anyone remotely homophobic.

I can dig out some references if anyone wants them.

If it makes you feel better, I have also done this while mid migraine. Thankfully I realised when I got the confirmation, but I'd already paid for a fairly expensive flight (I booked the month I was in instead of like, in 3 months time), I had to pay a fee change it, and because it had to be with the same flight operator and there wasn't a lot of choice I ended up getting a very expensive taxi to the airport at 4 in the morning.

Executive dysfunction is expensive.