I can see symptoms for acute psychosis here, which itself is a symptom for schizophrenia. Back in 2019 I was about to visit my Dad after long, and on my way back he called me every hour weaving stories around "take care of yourself. Stay away from them, they will lure you and take you away." I genuinely thought this is some sort of joke at that point. However, when I reached home, he wasn't ready to recognise me. He said I'm someone else in his son's skin. He hit me twice. He started asking for details such as my friends, relatives, education, etc. to verify its the real me. He took me inside only when we visited a nearby temple and he conducted some sort of "ritual" on me.

My mom revealed that he has been weird since a week and she hadn't told me to avoid stressing me out. He hadn't slept at all in a week. All this stemmed from workplace harrasment. He convulated his own conspiracy theories, how each and every person out there is a threat, etc. Eventually he started hallucinating. For eg. He used to hear people mocking him, banging doors, he used to feel an electric shock while sitting on a chair. Once he even attacked my mom with a knife saying she's someone else and not his wife. Imagine my mom had not talked to me about this all this time!

Well then the next day I took him to a psychiatrist. My dad was asleep for the next 4-5 days. Eventually he got better. That was acute psychosis. Was a horrible horrible time. Now all's fine though. He talks about whatever stresses him out and that's what he needs to.

I request you to please schedule an appointment ASAP. This can be a threat to both of you. You never know he might kill/injure you in his sleep thinking you're someone else. He might also harm himself. I don't wanna scare you but you need to visit a doctor. Hope things pan out well and good.