Video Transcript
You should try to get in touch with the consulate and send them emails, etc., asking them their guidance and that way you have at least some proof that you are trying to get back into the USA on time, but if it goes past one year it can't be helped, you can always start a new green card if you like, not too many options here. FAQ in detail...
Note: This is a verbatim transcript of the referenced audio/video media delivered as oral communication, and, therefore, may not conform to written grammatical or syntactical form.