Hang in there. Mine are now 18 and 19 and with mine there were a lot of mental health issues from 15 to 17 and very few options for treatment
Almost no adolescent psychiatrists, counselors weren't taking new patients, etc. But I was glad we did our best to deal with the issues while they were still under my roof.
And I'll send positive vibes for a smooth trip. The lead up to traveling is always so stressful for me. The mental load wears me out. Once I'm on the plane, I'm usually calm. I hope this is a very special trip for your