Work with a lawyer. Your work card is no longer good until either I-290B is approved or you get new work permit as part of new filing.

Your mother was given a 221g letter stating what the embassy wanted. If you replied to that then all there is to do is wait. The case will remain...

Dont tell the officer at the airport of your immigrant intent!

He can petition but likely will need a co sponsor financially for anhousehold of at least 3 (him and his 2 parents)

Under facts given you are eligible for naturalization. No trip over 6 Months and here half the days of the 5 years.

Husband must also file I-864 evennif income is not enough. Co-sponsor can ise US Passport or Naturalization Certificate but hopefully has his "A...

Go into the CEAC system and upload it and bring all passports to interview.

Not only could you, you should file for your parents even with them having another method to get immigrant visa

I agree with my colleague and add that you can requeet a different Post for interview. It will be discretionary whether they take the case.

If you got your green card based upon asylum you should not travel back to that country.