I hope that the year since your post has given you some answers and that the medication is now helping your PD symptoms.
You are right, you will have had PD for a while before your diagnosis, as it is not easy to diagnose and the symptoms go unnoticed for a while. For my Mum they were niggles that could be ignored then got to the stage that they refused to be ignored and then she went to the dr. From that point it took nearly 2 yrs to get a diagnosis. (in 2002 - things have come a long way since then...)
This is a busy forum. I found your post on the unanswered section of the forum and had to reply - hope you have been reading other posts to get information about PD.
Hope all is well,