Your 9 month old child hit his head on the car's window??!!!.. kung ako mas mag aalala ako sa anak ko kesa sa kotse, mas inuna pang ipacheck sa talyer yung kotse kesa dinala sa hospital or clinic yung bata??? head trauma to children are far worse and might endanger your child's life lest have some life long effects..
right away you should've called for police and ambulance assistance.. and this coulve made things easier for you..