I have to agree with what everyone else has already said, if you want a solid answer you need to see a professional and get assessed. Psychotic symptoms can be caused by all kinds of conditions, not just schizophrenia. And there is such a thing as depression with psychotic features. Just a thought.

I hope you can find answers and get some help, it's obvious these symptoms(no matter what the exact diagnosis is), are causing you a lot of distress.

Take care and good luck. You can always post here when you're struggling too, Psych Central is an awesome place to get peer support from people who are going through similar things.