I am not diagnosed with schizophrenia, bipolar with psychotic features, but, I have a lot of trouble with sleeping. Except, when my husband is there I sleep fine. I don't know why.

but, of course I don't always have my husband there. He goes to bed at different times than me, and before him I had sever insomnia due to racing thoughts. Like you say, strange thoughts or even just reliving the past over and over in my head.... can't sleep with that going on.

One thing that helps me is white noise, like a fan. Having a fan on is very soothing to me. It helps me block out noises (like the house settling,) and something to focus on that is steady so I fall asleep.