I went through this process myself. Down here, the C&P psych examiner is a jerk. First thing you do is go to the VA Medical Center where you had the exam done and go to the medical records office and see if he has dictated his report. Tell them the date and type of exam and they will look it up. GET A COPY OF IT! You have a right to it! Then, if possible, go to the VA Regional Office with that copy and ask to see someone there. Have them look at your file and have them tell you what their screen shows. If they are waiting on the exam, show them your copy. If they take a copy from you, great. If not, then at least you know it's trapped in the mail. Better yet, get a vets organization to do the legwork for you. Join the American Legion, DAV, etc. They can be really good.
Keep the faith