I've been hesitant to reply, but no one else has. I tend to agonize over my replies a bit too much so I don't reply much.
Are you on any medications? Why won't your psychiatrist see you? I understand suggesting therapy, but it sounds almost like blackmail.
You're right, we can't diagnose. How long has this been going on for?
This isn't a diagnosis, but something to look into: going by your age and what you've mentioned, schizophrenia is a possibility. If that is the case (and even if it isn't), the sooner you receive treatment the better, especially considering your other thread. Personally (and I stress that), I think seeing a psychiatrist (maybe even a different one) as soon as possible is more important than seeing a psychologist for therapy. And if you feel you are a danger to yourself or others (as has been discussed on the other thread), please go to the ER. If you aren't on medication now, you most likely will be if you are inpatient. Is that a concern?