Cold Feet?

I don't know, can a person get cold feet as their study abroad departure date approaches? At the moment, that's how I'm feeling I guess. I'm leaving in a little more than 3 weeks, which seems crazy since I have been planning my trip to China for almost a year now. Up until now I was 80% excited and only about 20% nervous. Now it's totally taken a new turn and I'm 10% excited and 90% nervous AND afraid. I know that being afraid is supposed to be a good thing, because that means you will grow and becoming stronger from those experiences, but at the moment this fear is making me feel sick. I feel so many different emotions at once right now, all of which I was not told about among all the conversations I have had with people about studying abroad. I never knew that I would feel happy, sad, scared, nervous, and even angry at times, that I will be leaving, and being away from everything that I have come to know and love. I like my life here at UMF, and it almost feels it would be easier to stay here with my friends and the familiar place that I know. Well, I rephrase that: I know it would be easier to stay here. But the thing is, I can't take the easy way out here. I need to do this. I know many great things will be coming my way once I am in China, I'm just having a hard time to overcome these mixed emotions. :(

Help?