Aelius

I crossed the border in June and got married in June, then I got my biometrics done in September. Just this week I got an ID card in the mail that says "Permanent Resident", is green, and looks like other cards I see on Google Images when I search "US green card". But I'm confused. First, the USCIS website says processing times for the field office near me are several multiples longer than the time I've waited. But more importantly, I haven't even gone to the interview yet. Am I misunderstanding what card I got? Did I get it in error? Is there an additional card I'll get after the interview? Am I still considered in the AOS stage? What are the limitations on me at this time (e.g., can I work? Can I travel outside the US?) Much appreciated!