Trip anxiety- Idk how to calm down!

Hi everyone so I have major anxiety and depression. I also recently started having motion sickness:/ I’ve never been afraid to fly or go out of town until the past few years because my anxiety has gotten worse over the years.

I’m flying out to PR tomorrow with a group for a bachelorette and I’m terrified. I’ve never been this far before. It’s a 7-8ish hour flight with one stop. I know I won’t be on the plane the full 7-8 hours but just thinking of having to be in the airport and on a plane for that long makes me anxious. I don’t like not having a way out or space to seclude myself. I then also thought about ok well if I do have a panic attack on the plane I can go to the bathroom but then I realized how small the bathrooms are and that it wouldn’t actually help after all. I do have Xanax, Dramamine, and scopolamine patches but I’m worried the patches might make me feel worse as I’ve never taken them before. I think I’m going to take Dramamine an hour before the flight and idk possibly a Xanax. I’m so scared I really don’t want to go but I have to.

On top of that I have to fly back early by myself bc of a prior engagement. I really want to have fun and experience this but I’m so scared. Any tips or advice? ☹️