I mean this:
Have to spend three straight days with her, so I am really scratching my head here.
when it looks like a fun weekend is a big time red flag for you two as a couple IMO
Yeah, I usually spend most every weekend with her, but not travelling. Her level of stress is way higher than ever, and she's a normally very even keeled person.
I am just concerned, I'm not dreading spending time with her. we can't just go home if she's feeling overwhelmed, and she will only know me.
honestly your best course of action is to cancel your weekend plans with her and ignore her until she starts acting right
if she doesn't act right then delete her phone number and block her. you'll be doing her a favor, trust me
i'd send her a halloween card though, just to say hi, you don't want to burn any bridges