Hey
beammeupscottie - don't despair! There's a lot of sound advice above, and you CAN do this!
What I would add to what has already been said is that maybe you should do another DUAL x-country with an instructor, and maybe try someone other than your usual instructor. You want someone who will sit there and say nothing while monitoring what you do. They should be able to critique what you are doing right, and wrong. This will give you confidence, and highlight what it is you need to work on. Ater this, go out again and repeat the exercise solo!
Good luck!
Andy <img src="smile.gif" border="0">