This is a common problem especially with psychiatrists -- less usually with psychologists. On the other hand, your doctor might be completely wrong about your diagnosis as well -- psychosis cannot be diagnosed by a regular doc and PTSD is often wrongfully diagnosed. If you're psychotic, you might not even know you're ill, so maybe you just wrote the wrong thing. Right now, because of the new diagnostic manuals, which are based on selling pharmaceuticals and getting reimbursement from insurance companies, OCD, bipolar, ADHD, and PTSD are way over diagnosed. The way you survive it is by laughing about it -- you know what you're feeling. And then you find a different therapist.