Employer A Valid and Employer B REVOKED

HII’VE JOINED NEW ORGANIZATION ON APPROVAL NOTICE AND AFTER 20 DAYS I HAVE RECIEVED “NOTICE OF INTEND TO REVOKE “RFE FOR SPECIALITY OF OCCUPATION ON SAME APPROVED NEW PETITION.SUBMITTED REQUESTED DOCUMENTS ,YESTEDAY FROM USCIS RECEIVED “SENT REVOKE NOTICE”QUERY IS1)I’VE VALID OLD VISA AND I94 TILL 2019-JUNE.CAN I RE-FILE NEW PETITION AGAIN WITH CURRENT ORG AS MY OLD PETITION IS VALID?2)CAN I GO BACK TO MY PREVIOUS ORGANIZATION WITHOUT AMENDMENT OR WOULD IT REQUIRED.?URGENT HELP NEEDED.THANKS IN ADVANCE!!!