So if you're feeling homesick, just remember that it's normal and help is available. The most important thing to do is to talk to people, and not to feel like you're a failure or abnormal for having doubts and worries about your new life.
Chances are, you will settle in soon, and have the best time at university. The three years will rush by, and when its all over you'll even start to get nostalgic about being homesick.