I forgot to say... I have talked with my therapist at length about my psychosis. She always recommends for me to put on music or watch something (e.g., YouTube, TV, etc.) whenever I start to hear voices or see things.

As a tip: Sometimes it's better to listen to things through headphones because some headphones do a good job with sound isolation; and sound isolation is very important because I have found that my voices cannot talk over my music or TV or whatever. But if you find that music, TV, YouTube, etc. starts to talk to you or give you messages, then turn it off right away and tell your pdoc (or therapist if you have one).

I do know that tiredness contributes to my psychosis for sure. The more tired I am, the worse it gets. But I can't say that sleep is to blame for my psychosis, personally, because it is a constant thing for me.