history: I have to go to Mexico for business in two weeks.  I have never been and I am nervous
current: So I am headed to Mexico for work in about 2 weeks and I am a bit nervous.  I have never been and I am not sure what to expect.
next: I think that it's completely normal to feel that way for such a long distance trip. I assume you're going from America. I bet you would feel better by doing a bit of research!