Is your dx Schizoaffective Bipolar ?That's my diagnosis and you can have delusions without being manic or depressed with that. I recently was having religious delusions, I am a religious person but the stuff/beliefs I was going on about for a few weeks was not typical of me and I was also having other psychotic symptoms at the time too. I'm not saying that's what you are of course, everyone has different beliefs and I respect that, So I guess it can depend on some different factors. Is it a belief you've had for a long time in your life that's always been there even when completely stable? Have you had psychosis symptoms while not manic, etc

Can your doctor provide any insight on it? Maybe they would be able to tell whether it's related to delusional thinking or not if they know you well