I am a second-year student in University of Virginia and I came to the US from Hong Kong in 2001. I have a conditional green card that will expire on 5/10/08. I am going to remove the conditional status and renew my green card. Also, when I went to renew my driver's license last month, the DMV told me that I could only extend my driver's license til 5/10/08 because my green card will expire then. However, I wanna go to Puerto Rico with my friends from 3/1 to 3/6. Am I going to have trouble coming back to the US?