My wife wants a divorce just after my interview for my permanent resident green card, what can I do? A dew ex

You may be able to obtain a green card still if divorce proceedings are not initiated until after a decision is made. Depending upon how long you have been married, you may be granted a conditional green card which means you will need to remove the conditions in two years. You can still seek to remove the conditions if divorced if you can establish the marriage was entered in good faith.  Your wife's pregnancy gives you no independent basis for obtaining a green card. A child cannot petition for his/her parent until he/she reaches the age of 21.