I also have bipolar 1, but usually don’t have psychosis except when I’m on a antidepressant. Psychosis is very difficult to get in front of, it’s very very hard for the person who has it to realize they are I’ll once they’re in that state. If you’re on meds and they are not stopping the episodes I’d say the whole med regimen needs another look. And definitely you need an increase in meds around the time of psychosis. Surely they have records of your hospitalizations and can see a pattern? It’s a very valid desire to increase meds prior to an episode. Perhaps you can ask your doctor to review the records and see for themselves the pattern?