It's very frustrating. Schizophrenia and BP have some symptoms that overlap and other disorders have symptoms that overlap with Schiz, BP. Personality disorders can be mistaken for BP and vice versa. Like 40-60% of BP people have some kind of an anxiety disorder. Schizophrenia is a thought disorder, BP is a mood disorder. Schizoaffective is a combination of the two (but I don't think that diagnosis is used much these days according to my Dr.). PDOCs all have different opinions. Lots of PDOCs just end up treating the symptoms if things are very complicated.