My green card approved on January (Primary EB-2).
My wife got a notice for interview scheduled June.
I got laid off from sponsored company last Nov. Now, I am working at the firm of same type of business.

Q1.
Shall I go to Interview with my wife?
Q2.
Is it going to be a problem for my wife’s approval in that I am no longer with my previous office sponsored me?
Q3.
Can Immigration officer cancel my Green Card because I got laid off before I got green card?
Q4.
How can I prepare Employment verification letter? Is it okay with current employer’s letter?

Please help me…Thanks in advance..