Hello, welcome to JustAnswer, my name is Judith. Thank you for this opportunity to answer your questions.

Your only option at this point is to make an InfoPass appointment with the local USCIS field office (Detroit - Jefferson Ave) and take with your your current unexpired passport, the I-797 fee receipt and your travel itinerary or e-ticket.

The Information officer can put a temporary evidence of residence status stamp in your passport which will allow you to board your return flight and enter the US.

Judith

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