Well, you're already worried. The best advice I can give you is to go to your C&P without any preconceptions. The C&P will take place, unless you don't show up. You have no control over the doctor. I have always gone to my C&Ps, being honest and truthful about my conditions, no embellishments. Your medical evidence should already be in your file, but that is no guarantee that the doctor will look at it. Make sure your get a copy of the results, and if you don't agree with them, then you have other steps you can take; like filing a NOD, hiring a lawyer (that's what I had to do), etc...
Best wishes...