Your study at Northwood is a learning experience, not only in terms of academic work, but also as an opportunity to learn about Americans and their culture. How much you learn depends entirely on you. It is only natural that a person will feel insecurity in a new culture where the language, customs, and food are fundamentally different.
People adjusting to a new culture often experience physical changes for awhile.
The main point here is that you are aware of the adjustment process and take control of it. Adjustment to a new culture follows a fairly predictable pattern. As you prepared to leave for Northwood, you experienced both excitement and anxiety. Upon arrival, you may have felt overwhelmed by the language, culture, and new surroundings. Usually, at this point, the next steps are up to you.