Unfortunately, there is really nothing to do but wait unless the case is well outside of CIS-published processing times in which case you could...

Do not send your green card back by mail. Instead, schedule an InfoPass appointment and gain specific instructions for a correction.

Yes, you can get married while your boyfriend is in detention. Contact the chaplain at the detention center where your boyfriend is detained for...

CIS rarely sends confirmation of withdrawal notices. Please plan accordingly.

Will my husband be able to stay in United States while waiting a pending H4 case?

No, you will both need to consular process for your visas. In the meantime, be sure not to overstay your grace periods.

I was in removal proceeding?

If the judge told you that s/he would grant adjustment on October 17, 2019, then that is the date on which you will become an LPR.

MY mom legal status ?

The adjustment application was timely filed so she is in valid status ("A/S Pending"). Consult with immigration counsel prior to traveling.

How long should I wait for an administrative processing after an IV interview?

Administrative processing can take months. You should make plans accordingly. Good luck.

Can I apply for F1 when my H4 extension application is still under process ?

You should be able to study as an H-4. Consult offline with immigration counsel for personalized assistance. Good luck.

I change my address in USCIS do I have to change my address in NVC?

You should make your change of address known to the NVC as well as the CIS.