not being rude or anything of that sort,
you guys should have applied AS SOON AS you received your offer letters. Good planning pays off. I prepared my documents, character certificate etc before I got my letter. I still remember some of my pals (who're stuck in the same position as you lot) would be like itni jaldi kya hai, 10 weeks maximum time hai to bhir 5 weeks tak lag jaye ga etc etc. even though my classes start in September I applied back in april to have some time as a safety margin in-case anything went wrong (which did as I got my visa 75 days after my medical).
So If you don't get your visas in time, don't loose hope and remember to properly plan your next application.