My baby is 2year 11month old. from last 10 to 15days he is getting scared of everything. pressure cooker, chimney, movement of fan like these. he was not scared of these things before. even he was very social. he used to talk with any strangers. but now he start crying whenever someone come closer to him. nd when he gets afraid he becomes very restless and started crying and be hyperly active. what to do.i am very worried