What was the basis for your I-131? Did you leave the U.S. with a pending adjustment application? Your option now is to consular process for the...

A denial does not void the visa. But overstaying does void the visa.

To keep your H1b, you must work full time for the H1b petitioner. Since you have a work permit, you can also work for any other employer you...

Yes, you can request to opt out and retain the F2b.

Contact the embassy and ask them to reissue the visa.

There is no problem reentering the U.S. after quarantine in Mexico for two weeks. You may wish to try that.

Write who filed visa petition for you and when.

Send a follow up inquiry to the local office or through customer service. If that fails, you can file a petition for writ of mandamus.

You do need your husband to sign, to get the child a passport.

They might ask you about your overstay. Not likely though, since it is not relevant to whether to grant your application.