I am skeptical that you'll be able to prove that you have PTSD resulting from the cessation of your medication in 2001, that you could not have obtained the medication from a different doctor at that time (or the same doctor, bypassing the nurse practitioner), and that you did not connect your subsequent psychological condition to the cessation of medication until this year, some nine years later. Beyond that, New York doesn't provide a period of tolling based on late discovery. (Other tolling provisions may apply, for example, if you were mentally incompetent during this period.)

I suggest taking all of your medical records, including the treatment records from your current psychiatrist, to a malpractice lawyer for review.