I get anxious about missing my flight, about discovering at the airport that i'm missing some crucial part of my ticket, about being an academic failure over there. This is not what other people worry about for me. They worry about my safety, about my getting lost. Some express concern about my finding enough to eat as a vegetarian. If it occurred to them, i'm sure they would express express fervent hopes that i get along with my roommate because that was everyone's big concern my first year of college.
[Addition: People also keep asking me if i'm already to go, if i'm all packed. I leave in 4 days, people.]