I’ve noticed that my obsessive compulsive disorder and schizoaffective diagnosis sort of work together. My delusions start out as obsessions then gradually get worse becoming an overvalued idea, then eventually more bizarre and a full on delusion. I’m working on breaking the compulsions that fuel my obsessions and making sure I take my meds every day. I was wondering when exactly a delusion starts for others, does it build up to the delusion?