i have this sometimes, either the memories are vivid a bit too long (and vaguely plausible, like your parents dying) and i have to just sit there for a bit waiting for my brain to sort out if it’s real or a dream, or things don’t quite exit the dream state right and everything just feels wrong somehow, which is fucking miserable and means i have to just try to fall back asleep so the brain can reset things and wake up properly.