My boyfriend has been having psychotic episodes for 3 years now. They started out lasting a week+ and happen every few months. Now, for the past year, have been happening every single month (same exact day of the month every time) and last only 1.5-2 days. Originally they would get triggered by his ADHD meds combined with high stress situations but now, they just happen to happen. It's so upsetting because it causes us both a lot of pain and I'm so desperate to understand what this is because I can't find an answer anywhere. His psychiatrist thinks this is temporary and being that they've decreased in severity and duration, maybe he's right, but I'm kind of doubtful. His hallucinations and delusions used to be about bugs but now they are things like him believing I'm cheating on him, hacking into his phone.. they just target me and it's become very stressful when I'm the main target and he takes out his aggression and paranoia out on me. 

He is on abilify 5mg (was originally 2mg) and tried risperidone previously but nothing seems to help. 

My questions are: 
Can this be considered schizophrenia? Is it possible for schizophrenia to come and go with very short lasting episodes? Is schizophrenia can be episodic, can it happen EVERY SINGLE 30 DAYS on the dot?? I just don't understand.