So my son was sound asleep for the night and out of nowhere started screaming crying! I picked him…

So my son was sound asleep for the night and out of nowhere started screaming crying! I picked him up and told him " mommy's here" but the crying and screaming got worse. My grandma got up and tried calming him but that didn't work either. He's never done this. He screamed and cried for literally 10 mins. Idk what went wrong in his sleep😢