My 485 was approved last November, but I have not received my green card so far. I cannot remember how many times I called the 800 number and how many times I visited the local office, but I got nothing. Last time an IO at the local office suggested me to try filling I-90. I did it, but I have not even received a receipt notice so far after 3 weeks. I had my passport stamped with a temporary I-551 in February, but the stamp will be expired in August. My questions are:
1, normally how long a receipt notice is issued for I-90?
2, after my present I-551 is expired, can I continue to work? can I have my passport stamped with a new I-551?
3, do you have any suggestions how I should do next?
Thank you very much for you time and help.