Tired obsession and Infinite loop, and suicidal thoughts

I have bipolar/schizoeffective disorder (diagnosed with both so not sure which one it is). I have a problem where I get stuck in looped thinking about being tired. It’s like a psychological splinter. I obsess over being tired, over and over again. Mostly this occurs at the end of the day. It’s a constant feeling that I’m tired and going to yawn. “I’m tired I’m tired I’m tired I’m tired I’m tired...” plays over and over in my head. This all started when I stopped taking my anti-psychotic medication. When I restarted the looped thinking remained.

I havent read read about anybody else with this problem, and I’m now desperate to know what I can do about it. It’s made me extremely depressed because every day for a few hours (sometimes the looped thinking occurs during the day too) I’m starkly reminded that my brain isn’t functioning properly. I then get suicidal and have made plans how I’d end my life. I don’t see how I can keep on going if the problem continues, as extreme as it sounds.

Even though everybody gets tired, sure, no big deal, it is a big deal for me. It’s so draining and debilitating to have to put up with looping and intrusive thoughts that I can’t stop, even using OCD treatment methods.

I think what ive got is more than OCD. Especially because I yawn a lot (sometimes 30 yawns in a short period). I believe my brain chemistry has changed and now I’m stuck with looping thoughts. I had really bad looping thoughts when I was psychotic.

I hope somebody here has insight or advice for me. Running out of options, tried different types of anti psychotics and mood stabilisers.

Thanks.