Yes this may impact a K1 visa filing based on your statements at entry.

No the visa would not be immediately terminated.

The filing will be rejected without fee.

You may bring the documents at time of interview unless specifically requested then follow the instructions on document provided.

Divorce is ok even if you had a conditional GC but you will need a waiver for I-751 if so.

Best to consult with an attorney to review your case history.

Contact your local Senator for assistance.

The departure would render your case abandoned.

Yes your spouse is a USC and can petition you.

Yes your spouse may petition for you at this time. Consult with an attorney for guidance.