My 3 year old daughter has started going to pre school. She cries a lot. initially this is settling time in school so they allow the kids for 1.5 hours to 2 hours. all the time she cries and sometimes vomits also. She want me to be with her all the time. One day the teacher kept all kids in classroom and closed the door. so she became little scared. whatcshall i do to make her normal. will she be allright.