Night Terrors at 1.5 yo??

We’re on vacation and my poor dude has had a rough couple days. I’ve always been protective of his sleep cuz it’s rare he gets good sleep. Unfortunately he’s teething molars on top of sleeping in a new environment for another week. He was fine the first 4-5 nights then the last 2 he’s woke screaming bloody murder, very much out of it, not really seeming to notice me or daddy there. 💔

I’ve read they can start around 18 months, which he’s juuust about. In 9 more days he’ll be 1.5.

Is there any real way to tell if it’s that or his teething that’s bugging him or the newer (but previously fine) sleep environment? Or just over tired (which I’ve read can contribute to terrors)...idk. All 4 of us are room sharing which is fine...till he wakes. My poor 3 yo is getting affected by it now too and she’s my rock hard sleeper lol!

Not to mention I’m 31 weeks with #3. I hope these don’t last...for everyone’s sake! 😭