Which process are you referring to? Are you with NVC or USCIS?

Yes based on your current filing category, unauthorized work would be scrutinized.

No a G28 is not required for DS160.

Your stay is authorized within the I94 validity period.

Best to review contract and work with an employment attorney.

Contact the consulate to request return of passport.

Not without valid work authorization.

Depends on the current processing times which vary by weeks to months.

The Romanian embassy is best able to assist and advise.

Yes the I485 will be denied as well.