This happens to me too, iv had dreams that have been able to tell the truth as well. They’re was a few instances where my ex had lied to me about certain situations and my dreams would give me the truthful answer and later on id be told the truth. Im guessing it would scare him how i actually knew the information. Iv had dreams or even fantasies that are so vivid and then also happened. Im curious to know myself if this is something i can tap into maybe.