And then it went quiet...

A few days ago I took my 4-year-old son to the annual check-up at the hospital and as soon as we entered the doors of the hospital he decided there was no point in talking at all. The visit lasted about 45 minutes but felt like two hours. He hardly answered when the nurse asked him to tell her what he could see in the pictures she held in front of him, and when he had to wear headphones for the hearing test he simply refused. I stated "normally he talks a lot", but she looked very doutbful and told me she thought it was a good idea to send him to a speech therapist! This is a boy who normally talks a lot to the point where you think it's too much and who is sociable beyond anything I have seen before but apparently this doesn't apply to every day because this was the day when it all went very quiet...