HELP - coworkers hate me

Hi hi,

I love my job in theory. Recently, the 3 coworkers in my department who teach right beside be have become incredibly close, catty and exclusive. It's okay that I don't really fit in with them, but when I make a mistake that offends them, they hold the grudge until the end of time. I'm often not even aware that I have offended them.

It started really subtly, so I have no idea how to address it now.
At first, they just didn't stop their conversations and acknowledge me when I walked into the room. I thought they were just caught up in their conversations. They have stopped letting me know when meetings are cancelled/moved. I forgot to go to a meeting and no one text/called to see where I was. They didn't let me know about an important decision made at a meeting that I had to miss - even though I emailed and asked in person for them to fill me in. We no longer collaborate on planning - which is a really helpful thing to do as I am a newer teacher.

None of these things are crazy on their own, but all together they are making work a very hard place to be. I am constantly nauseas from the anxiety. It's like I can feel their dislike/hatred of me through the walls.

The only thing I can think of that I have done is let the principal know that one was arriving late consistently.
I don't think I have done anything to the others, but they are very tribal and protective of each other.

The kids don't like me either. Man, I'm lonely.

How can I address this with coworkers?
Do I speak to my principal about this?
I have never been good at navigating female relationships...

TL;DR: Coworker drama making me nauseas. Don't know how to resolve.