They want to sleep a lot and write many letters home. They may feel frustrated and hostile toward their host country. They may get excessively angry about minor irritations. It is not unusual for them to become very dependent on fellow nationals in the new country. All these feelings make it difficult to deal with the residents of the host country and to use their language.
Different people react differently to culture shock.
Some become depressed, while others are stimulated by the new experiences open to them. Try to remember that thousands of people have come to Newark from other countries and have thrived. Evaluate your expectations. Your reactions to the United States, to Newark, and to the university are products both of the way things are here and of the way you expected them to be. If you determine that your expectations were unrealistic, you can do much to reduce the amount of dissatisfaction you feel.