Can it be that a child is scared?

Can it be that a child is scared? We're three months old and every nap we wake up with crying, just suddenly the baby can start screaming all over ?. But at night he sleeps normally, but during the day (I think he might have been scared somewhere, something, or they winked ?). Guests come home often, when he was little, and relatives also call by video and start cuddling him. What a sweet Utti!