my son is 5 months old. This morning he fell off the bed and landed face down onto the floor. I panicked and grabbed him. He had no bumps no redness. cried but seemed ok after I rocked him. He ate and went to sleep for 20 mins. all day long he seems fine but refuses to take his daily nap and now it is 2am and still no sleep. this isn't like him and he usually is asleep by 10pm the latest. what should I do. is this normal