I entered at JFK 22 days ago and still no welcome notice. I know technically you have to wait 30 days before contacting them, but should I be worried? Is it okay to call USCIS and ask what's happening? Also, can I track the green card status somewhere? I tried check my case with my immigration case number, but it's stuck on Post-Decision Activity from early 2011... Since then, I got my interview, visa approved etc... I have to travel on the 23rd; I hope there are no significant delays as it would be great to have the GC when I come back in a few weeks.