Ok, first off, I as well was diagnosed with depssreion as a teen. In recent years, I've had a family member fall ill with a pretty serious mental condition that mimics schizophrenia. From my experience, which is quite vast, with Psychiatrists/psychologists most of them take educated guesses as to what is wrong with you. Many of them will even admit to that. They can only treat symptoms, as we still do not know how the brain truly functions as of yet. Psychology 101 is an intro course which in my opinion everyone should be required to take. It explains a tremendous amount about psychology and the advances that we have made. It also explains that we still have so much ground left uncharted. My best advice would be to go see your psychiatrist/psychologist and see what they think. Only you truly know how bad you are feeling, and the only difference between the two is the types of medication that they will try on you. Best of luck to you!