Nerves @ a few weeks out

I hate to sound like a melodramatic weenie, but anticipation and nerves have set in here and there.

I’ve actually had trouble sleeping the past few nights, because the trip has been on my mind. Things to take care of, little concerns (mostly silly, probably), like whether or not I’ll do all right, get around okay… crazy stuff.
So much to think about, plus it’s such a huge trip. On the one hand I feel confident, on the other I feel like a ball of nerves at times. Anyone care to smack some sense into me?