I agree that it might be good for your peace of mind if you talk to your pdoc. Before you go if possible.

But that said, I notice it if I find myself getting less and less sleep over the course of a few days. It kind of ramps up sometimes. Sometimes. And also, worrying about it a lot will ALSO mean that you will get less sleep. Which is never a good thing anyway. It's a stress based kind of illness so if you stress yourself out about it would only increase the chances.

Do you have someone you can call every couple of days? It might help to talk to someone who knows you extremely well as often as you possibly can to kind of give you regular reality checks if it's something you're concerned about.

Try not to worry about it and I hope you enjoy your trip!