What is the next step if i lost my travel i20? I have no time for my journey...

currently i am studying ms in usa . during sem break i came to india. now i am in india .Tomorrow is my flight schedule heading to usa from india. today i found that lost my travel i20

what is my next step ? tell me its very urgent…

because i have no time shall i reschedule my flight ? or travel with old f1 i20 which was issued by my university…

please reply me as early as possible…

Not sure, what you have done…please share details. Ideally, you would call the school/ DSO and see, if something can be sent as scan copy immediately, explaining your situation. If not, then you could have rescheduled it and then carry with proper documentation. It can be tricky to enter Port of Entry with incorrect or missing documentation.