I would suggest reaching out to CAIA directly. They are very responsive.
I hate to say it, I also believe this is why they offer a 2-week exam window for both levels, so you may out of luck. Good luck. Is there an option to sit for the exam where you are traveling to?
Yes, you can still change the test date and location. It has to be within the two week window though. But I’ve been moving mine around because of work conflicts with no problem. Sign in to caia.org, go to My Exam Info, then Schedule Your Exam, and then Schedule Your Exam Now. Finally, click the link on the left that shows your current test date.